Computer Network and Internet Basics

What is the main difference between a network and an internet?

A network is a group of connected devices, while an internet is two or more networks that can communicate with each other.

What are examples of communication links mentioned in the text?

Fiber, copper, radio spectrum

What is the role of routers in a network?

Routers forward packets (chunks of data)

What was the significance of the year 1969 in the context of internet communication system?

It marked the emergence of internet communication system. Signup and view all the answers

How did the capacity of undersea cables change from the 1960s to 1996?

It increased significantly from carrying 138 calls to carrying 1.5M calls. Signup and view all the answers

In circuit switching, what happens during the setup phase?

A dedicated communication path is established Signup and view all the answers

What type of network involves data being sent in discrete portions?

Packet switching Signup and view all the answers

What is a characteristic of circuit switching in terms of bandwidth?

A circuit occupies a fixed capacity of each link for the entire connection duration Signup and view all the answers

What is the primary difference between datagram networks and virtual circuit networks?

Each packet is switched independently in datagram networks Signup and view all the answers

What is a key aspect of the transmit data phase in circuit switching?

Data transfer phase involves sending data over the established circuit Signup and view all the answers

In circuit switching, what happens during the teardown phase?

The dedicated resources are released and the circuit is terminated Signup and view all the answers

What is a key characteristic of packet switching in computer networks?

Data is sent in discrete portions Signup and view all the answers

What is the primary difference between circuit switching and packet switching in terms of resource allocation?

Circuit switching requires dedicated resources for the entire duration of data transfer, while packet switching does not Signup and view all the answers

What is a key aspect of broadcast networks in communication networks?

End nodes share a common channel (TV, radio…) Signup and view all the answers

What is a distinguishing feature of virtual circuit networks in computer networks?

Each packet follows a pre-established path through the network Signup and view all the answers