Internet and Networking Definitions

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Questions and Answers

What is the definition of the Internet?

computer network that interconnects billions of computing devices throughout the world / Network of networks

What does a packet switch do?

takes a packet arriving on one of its incoming communication links and forwards that packet on one of its outgoing communication links

What is an Internet Service Provider (ISP)?

a network of packet switches and communication links

What is the definition of a Protocol?

<p>the format and the order of messages exchanged between two or more communicating entities, as well as the actions taken on the transmission and/or receipt of a message or other event</p> Signup and view all the answers

What are Access Networks?

<p>the communication networks that connect end-user devices, such as computers, smartphones, and tablets, to the internet</p> Signup and view all the answers

What is Frequency Division Multiplexing (FDM)?

<p>different channels transmitted in different frequency bands</p> Signup and view all the answers

What are the two main types of physical media for signal propagation?

<p>twisted pair copper, fiber optic, coaxial cable, electro-magnetic radio waves</p> Signup and view all the answers

What is the transmission rate of fiber optic cable?

<p>10-100 Gbps</p> Signup and view all the answers

What is the difference between circuit switching and packet switching?

<p>Circuit switching establishes a dedicated communication path before data transmission, while packet switching divides data into smaller units called packets and transmits them over the network.</p> Signup and view all the answers

What are the components of a packet in packet switching?

<p>Each packet contains the source and destination addresses, as well as other information needed for routing.</p> Signup and view all the answers

What is the function of routing in packet switching?

<p>Determines the source-destination route taken by data packets using routing algorithms.</p> Signup and view all the answers

What is network delay and when does it occur?

<p>Network delay occurs if the size of the queue is large, and each packet has to wait in excessive network traffic.</p> Signup and view all the answers

When does packet loss occur?

<p>Packet loss occurs when the network reaches its maximum capacity and can't accommodate any more packets.</p> Signup and view all the answers

What is nodal processing in network communication?

<p>The time taken by the switch to read data packets header information (source, destination, and length L).</p> Signup and view all the answers

What is the purpose of spyware?

<p>To record keystrokes, web sites visited, and upload info to a collection site.</p> Signup and view all the answers

What is a Distributed Denial of Service (DDoS) attack?

<p>Attackers make resources (server, bandwidth) unavailable.</p> Signup and view all the answers

What is the function of a packet switch?

<p>Forwards a packet arriving on one communication link and forwards that packet on another communication link (C)</p> Signup and view all the answers

What does Frequency Division Multiplexing (FDM) refer to?

<p>Transmitting different channels in different frequency bands (D)</p> Signup and view all the answers

What is the purpose of a Local Area Network (LAN) or Ethernet?

<p>To connect different sub-networks and servers via interconnected switches (D)</p> Signup and view all the answers

What is the transmission rate offered by Wide-area Wireless / cellular networks / Global System for Mobile communication (GSM) using 3G, 4G, or 5G technologies?

<p>Between 1 and 10 Mbps (B)</p> Signup and view all the answers

What does an Internet Service Provider (ISP) consist of?

<p>A network of packet switches and communication links (A)</p> Signup and view all the answers

What is the role of Access Networks in the context of the internet?

<p>Connects end-user devices, such as computers and smartphones, to the internet (B)</p> Signup and view all the answers

What type of physical media allows signals to propagate freely?

<p>Electro-magnetic radio waves (A)</p> Signup and view all the answers

What is the main characteristic of fiber optic cable?

<p>Carries light pulses, each pulse a bit (D)</p> Signup and view all the answers

In packet switching, what does nodal processing refer to?

<p>Time taken by the switch to read data packets header information (A)</p> Signup and view all the answers

What is the function of routing in packet switching?

<p>Determines source-destination route taken by data packets using routing algorithms (D)</p> Signup and view all the answers

What is the main characteristic of coaxial cable?

<p>Transmits data in electron format (C)</p> Signup and view all the answers

What is the primary purpose of spyware?

<p>Record keystrokes and web sites visited (A)</p> Signup and view all the answers

When does packet loss occur in a network?

<p>When the network discarded some packets because the queue reaches its maximum capacity (B)</p> Signup and view all the answers

What is the method used by circuit switching for data transmission?

<p>A dedicated communication path or circuit established between two devices before data transmission begins (A)</p> Signup and view all the answers

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