Networks Intro 1

Question 1

Packet Transmission Delay Formula

Answer 1

L (bits) / R (bits/sec)

Question 2

What is a distributed system?

Answer 2

Hardware or software components located at network computers communicate and coordinate their actions only by passing messages

Question 3

What do distributed systems allow for?

Answer 3

1. Concurrency
2. No single global notion of the correct time
3. Each component in a network can fail independently

Question 4

What is intranet?

Answer 4

A part of the internet that is separately administered and uses a firewall to enforce its own local security policies. Users in an intranet share share data by means of file services

Question 5

What is firewall?

Answer 5

A network security system that monitors and controls incoming and outgoing traffic based on predetermined security rules

Establishes a barrier between a trusted internal network and an untrusted external network.

Generally categorised as network-based or host-based

Question 6

Circuit Switched vs Packet Switched Network

Answer 6

Circuit Switching requires a physical connection between 2 nodes.

Packet Switching sends packets of data between 2 computers

Question 7

What advantages does a circuit-switched network have over a packet-switched network?

Answer 7

More reliable in that it guarantees bandwidth. Good for something that needs consistent, reliable network connection, such as voice calls.

Question 8

What advantages does a circuit-switched network have over a packet-switched network?

Answer 8

More reliable in that it guarantees bandwidth. Good for something that needs consistent, reliable network connection, such as voice calls.