Networking

Question 1

WAN

Answer 1

Wide area Network

Question 2

What is the internet?

Answer 2

Network of interconnected Networks

Question 3

What is a LAN?

Answer 3

two or more computers connected togather within a small geographic area

Question 4

What are Protocols?

Answer 4

defines a set of rules required for data communication between devices

Question 5

What is Circuit switching?

Answer 5

Circuit switching involves creating a communication between two endpoints for the duration of the transfer of data
No other data can use any part of this circuit until the transmission is complete
data packets used

Question 6

What are data packets?

Answer 6

when sending across a network,data is broken into equal size chunks(units) called data packets and assembled again at the receiving end

Question 7

How do data packets help

Answer 7

they improve efficiency and reliability

Question 8

What is packet switching?

Answer 8

Packets are often sent across networks that have multiple through to a destination
(network often shared)

Question 9

What is routing?

Answer 9

Routers transfer data packets from one network to another

Question 10

What is a ‘Hop’ in terms of routing?

Answer 10

Each transfer from a router is known as a hop?

Question 11

Routing process

Answer 11

Each router stores data about the available routes to the destination
looks up the destination IP ADDRESS (in its routing table)and finds best router to forward the packet to
Routers continue to forward the packet until destination node is reached

Question 12

Why are packets deliberately kept small?

Answer 12

To ensure that the packets do not take excess time to transfer preventing other packets from moving

Question 13

What is required when data is transferred from one network to another but with different protocols?

Answer 13

A gateway

Question 14

What is a MAC address?

Answer 14

Uniquely identifies a physical device with a network interface card(NIC)

Question 15

What is client-server?

Answer 15

is a model where one entity (the client) requests services from another (the server)

Question 16

What is peer-to-peer?

Answer 16

have equal status

each computer on the network acts as both client and server there is no centralized control

Question 17

The TCP /IP stack

Answer 17

Has four layers unlike OSI model with 7
Application-this layer is concerned with the production,comunication adn reception of data
Transport- concered with the establishment and termination of connections between etworks entities via routers
Internet- provide links to transmit datagrams across different networks
Link-not concerned with routers
designed to make overall network hardware independent

Question 18

what is IP addressing

Answer 18

each device on eh network has an a unique IP Address

both static and dynamic

Question 19

Differences between circuit and packet switching

Answer 19

CS establishes a route for the duration of the message/PS has no established route
CS sends packets all on same route/PS means packets being sent on individual routes
CS packets remain in correct order (but must be reassembled)/PS packets arrive out of order (and must be reordered)