Ch7 - Communication & Networks P1 Classified.pdf

Ch.7: Communication & Networks Eng. Omar El Safty Communication & Networks P1 1 Five statements about serial and parallel data transmission are made in the table below. By placing a tick (✓) in the appropriate column, selec...

Ch.7: Communication & Networks Eng. Omar El Safty Communication & Networks P1 1 Five statements about serial and parallel data transmission are made in the table below. By placing a tick (✓) in the appropriate column, select which statements refer to serial transmission and which statements refer to parallel transmission. Serial Parallel Statements (✓) (✓) Transmission method used by the memory bus inside a computer Data can be skewed (out of synch) when travelling over long distances Least expensive of the two types due to fewer hardware requirements Most appropriate if data is time-sensitive; for example, when live streaming where faster transmission rate is essential Suffers from less risk of external interference 2 178 Ch.7: Communication & Networks Eng. Omar El Safty 3 Computer A needs to be directly connected to a router that is located in a different room. Tick (✓) one box to identify whether serial data transmission or parallel data transmission is more suitable for this connection. Explain the reasons for your choice. Serial data transmission Parallel data transmission Reasons for your choice.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 179 Ch.7: Communication & Networks Eng. Omar El Safty 4 180 Ch.7: Communication & Networks Eng. Omar El Safty 5 181 Ch.7: Communication & Networks Eng. Omar El Safty 6 182 Ch.7: Communication & Networks Eng. Omar El Safty 7 Data transmission depends on data direction and how many bits of data can be sent at a time. Complete the table below to show what type of data transmission is being described in each case. Tick (✓) two boxes for each description. Simplex Half-duplex Full-duplex Serial Parallel Description of transmission taking place (✓) (✓) (✓) (✓) (✓) Data sent one bit at a time down a single wire in one direction only Data sent 16 bits at a time down 16 wires in both directions, but not at the same time Data sent 16 bits at a time down 16 wires in both directions simultaneously Data sent 8 bits at a time down 8 wires in one direction only Data sent one bit at a time down a single wire in both directions simultaneously Data sent one bit at a time down a single wire in both directions, but not at the same time 183 Ch.7: Communication & Networks Eng. Omar El Safty 8 9 184  Ch.7: Communication & Networks Eng. Omar El Safty 10 Some statements about USB connections are made in the table below. By ticking (✓) the appropriate box, indicate which statements are true and which statements are FALSE. Statements True (✓) False (✓) USB can support any cable length between device and computer USB uses serial data transfer USB connections can transfer data using half-duplex or full-duplex There is no need for devices to have a power source because USB cable supplies 5V of power 11 12 Describe the purpose of a router in a network.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 185 Ch.7: Communication & Networks Eng. Omar El Safty 13 Describe the purpose of the Network Interface Card.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 14 Describe the purpose of the router.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 15 Explain what is meant by MAC address............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 16 Explain what is meant by IP address............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 186 Ch.7: Communication & Networks Eng. Omar El Safty 17 Identify one similarity and two differences between IP and MAC addresses. Similarity …................................................................................................................................................................................................................................................................................... Difference 1................................................................................................................................................................................................................................................................................. Difference 2.............................................................................................................................................................................................................................................................................. 18 IPv4 and IPv6 are versions of IP address. Identify one other similarity and two differences between IPv4 and IPv6. Similarity …................................................................................................................................................................................................................................................................................... Difference 1................................................................................................................................................................................................................................................................................. Difference 2.............................................................................................................................................................................................................................................................................. 19 Explain the term data packet. 187 Ch.7: Communication & Networks Eng. Omar El Safty 20 Identify three components of a data packet 1 ………………………………………………………………………………………………………………… 2 ………………………………………………………………………………………………………………… 3 ……………………………………………………………………………………………………………… 21 Describe the structure of a data packet.............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 22 Data packets contain a header. Name three components that you would expect to find in a header 1 ………………………………………………………………………………………………………………… 2 ………………………………………………………………………………………………………………… 3 ……………………………………………………………………………………………………………… 23 Data packets also have a payload and a trailer. Name one component you would find in the payload and one component in the trailer. Payload ………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… Trailer …………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………. 188 Ch.7: Communication & Networks Eng. Omar El Safty 24 Describe the process of packet switching ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………. 25 Packet switching is used to send packets of data over a network. (a) Give three benefits of using packet switching. 1................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 2................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 3.............................................................................................................................................................................................................................................................................................................................................................................................................................................................. 189  Ch.7: Communication & Networks Eng. Omar El Safty (b) Give three disadvantages of using packet switching. 1................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 2................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 3.............................................................................................................................................................................................................................................................................................................................................................................................................................................................. 26 Describe the structure of a MAC address..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................[4 190  Ch.7: Communication & Networks Eng. Omar El Safty 27 State which network terms are being described. (a) A circuit board or chip that allows a device to connect to a network:......................................................................................................................................................... (b) Type of address that uniquely identifies a device connected to a network:......................................................................................................................................................... (c) Address assigned by an ISP to a device each time it logs onto the internet:......................................................................................................................................................... (d) Hardware device that allows data packets to be moved between different networks:......................................................................................................................................................... (e) Hardware or software that sits between a computer and an external network; it monitors traffic to and from the computer:......................................................................................................................................................... 28 Describe the characteristics of an IPv4 address.'....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 29 Describe the characteristics of an IPv6 address.'....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 191  Ch.7: Communication & Networks Eng. Omar El Safty 30 Describe what is meant by a dynamic IP address................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 31 Describe what is meant by a static IP address................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 32 Describe what is meant by parallel half-duplex transmission. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………. 192 Ch.7: Communication & Networks Eng. Omar El Safty 33 Describe what is meant by serial simplex transmission. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………. 34 Describe what is meant by parallel full-duplex transmission. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………. 193  Ch.7: Communication & Networks Eng. Omar El Safty 35 Complete and annotate the diagram to demonstrate how packet switching is used to transmit data across a network, including the use of routers, from Device A to Device B. Device A Device B 36 Five network terms or definitions are given in the table. Complete the table by giving the missing term or definition. Term Definition............................................................................................. router.......................................................................................................................................................................................... This address is assigned by the network and used to............................................................. identify a device on a network.............................................................................................. network interface card (NIC).......................................................................................................................................................................................... This address is assigned by the manufacturer and is used............................................................. to uniquely identify the device. This can be hardware or software based and filters traffic............................................................. coming into and out of a network. 194 Ch.7: Communication & Networks Eng. Omar El Safty 37 (a) Six statements are given about methods of data transmission. Tick (✓) to show if each statement applies to serial simplex, parallel simplex, parallel half- duplex or serial duplex data transmission. Some statements may apply to more than one data transmission method. Serial Parallel Parallel Serial Statement simplex simplex half-duplex duplex (✓) (✓) (✓) (✓) bits are transmitted along a single wire data is transmitted in both directions it is only suitable for distances less than 5 metres bits from the same byte are transmitted one after the other data may not arrive in the correct sequence data is transmitted in both directions, but only one direction at a time (b) A Universal Serial Bus (USB) connection can be used to transmit data from a mobile deviceto a computer. Give three benefits of using a USB connection for this purpose. Benefit 1.................................................................................................................................................................................................................................................................................... Benefit 2.................................................................................................................................................................................................................................................................................... Benefit 3................................................................................................................................................................................................................................................................................. 195  Ch.7: Communication & Networks Eng. Omar El Safty 38 Umar is a manager in an office. The data that he uses on a daily basis is stored on a file serverclose to his computer. Data is sent from his computer to the file server using parallel simplex data transmission. (a) Describe how the data is sent using parallel simplex data transmission........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (b) The file server is moved to another building that is 1 km away. Explain why the parallel simplex data transmission method that Umar uses is no longersuitable.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 39 The data is transmitted using packet switching. (i) Identify two items of data contained in a packet header. 1........................................................................................................................................ 2........................................................................................................................................ (ii) Give the purpose of a router in the packet-switching process...................................................................................................................................................................................................................................................................................... 196  Ch.7: Communication & Networks Eng. Omar El Safty 40 Data is transmitted between a computer and a printer. The data is transmitted one bit at a time down a single wire. The computer can transmit data to the printer and the printer can transmit data to the computer, using the same connection. Circle the two data transmission methods that will transmit data in this way. parallel full-duplex parallel half-duplex parallel simplex serial full-duplex serial half-duplex serial simplex 41 Complete the statements about data packets and packet switching. Use the terms from the list. Some of the terms in the list will not be used. You should only use a term once. destination address first footer header last main data packets payload routers servers trailer Data is broken down into packets. A data packet has a packet....................................................... that contains the packet number and the........................................................ Each packet could take a different path from the sender to the receiver; this is controlled by....................................................... Packets may arrive out of order. Once the...................................................... packet has arrived, the packets are reordered. 197  Ch.7: Communication & Networks Eng. Omar El Safty 42 The table contains descriptions about data transmission methods. Complete the table by identifying which data transmission methods are described. Data transmission method Description Data is transmitted down a single wire, one bit at a time,............................................................ in one direction only. Data is transmitted down multiple wires, multiple bits at a............................................................ time, in both directions, but only one direction at a time. Data is transmitted down a single wire, one bit at a time,............................................................ in both directions at the same time. Data is transmitted down multiple wires, multiple bits at a............................................................ time, in one direction only. 43 Draw and annotate a diagram to represent the role of a router. 198