Packet Switching in Communication Networks

Expensive due to switch and cabling. If the central switch fails, the rest of the network fails.

No cabling cost, better reliability and speed as the number of nodes increase, automatic incorporation of nodes, and improved speed due to no central switch.

Costly wireless-capable devices needed, large quantity of cable required, difficult network maintenance.

<p>A set of rules defining how two computers communicate with each other.</p> Signup and view all the answers

<p>HTTP, TCP/IP, POP3, IMAP, FTP.</p> Signup and view all the answers

<p>It allows computers worldwide to communicate with each other.</p> Signup and view all the answers

<p>The largest WAN is the Internet, and it is made up of a series of smaller networks.</p> Signup and view all the answers

<p>The domain name system (DNS) is used to name and organize internet resources. It is a hierarchy where each smaller domain is separated from the larger domain by a full stop.</p> Signup and view all the answers

<p>The role of the domain name system server (DNS server) is to translate domain names into IP addresses when we wish to access a website.</p> Signup and view all the answers

<p>A data packet contains a header with sender and recipient IP addresses, the protocol being used, the order of the packets, and the time to live/hop limit. The payload contains the raw data to be transmitted, and the trailer contains a checksum or cyclic redundancy check to detect transmission errors.</p> Signup and view all the answers

<p>Circuit switching and packet switching are two techniques used by networks to exchange data. Circuit switching establishes a dedicated communication path between devices, while packet switching breaks data into smaller packets that are sent independently and can follow different routes to the destination.</p> Signup and view all the answers

<p>Domain names are much easier to remember than IP addresses, which is why they are used to link to servers across the world. The domain name system (DNS) translates these domain names into IP addresses when we wish to access a website.</p> Signup and view all the answers

<p>In packet switching, data is broken into packets and transmitted over the most efficient route, while in circuit switching, a dedicated end-to-end connection is established for the entire communication.</p> Signup and view all the answers

<p>If one path breaks in a packet-switched network, packets can be routed through alternative paths, ensuring continued communication.</p> Signup and view all the answers

<p>In circuit switching, bandwidth is wasted during periods when no data is being transmitted, as the dedicated connection is maintained throughout the communication.</p> Signup and view all the answers

<p>Checksums and cyclic redundancy checks are used to ensure the integrity of data packets and detect errors during transmission.</p> Signup and view all the answers

<p>In circuit switching, devices must transfer and receive data at the same rate to maintain the dedicated connection and prevent data loss or corruption.</p> Signup and view all the answers

<p>In circuit switching, data arrives in a logical order, resulting in quicker reconstruction of the data compared to packet switching, where packets may arrive out of order.</p> Signup and view all the answers