Networking

Question 1

Name 2 Advantages of a Network

Answer 1

Easy Communication, Expensive peripherals can be shared

Question 2

What are the 4 layers?

Answer 2

Link, Internet, Transport and Application

Question 3

What is the Link layer for?

Answer 3

It is responsible for placing the packets on the network and also receiving the packets. It is where the data is sent/recieved. It is sent using the specified protocols. The MAC Address is also attached

Question 4

What is the Application layer for?

Answer 4

It provides applications the ability to access the services of the other layers and it defines the protocols that applications use to exchange data. An appropriate header is added. It also needs to encode it, ASCII or UniCode.

Question 5

What is the Transport layer for?

Answer 5

Sets up the connection. It then receives the data from the application layer. It numbers the packets so that they’re reassembled in the correct order. It looks at what packets have arrived and sends the acknowledgement.

Question 6

What is the Network layer for?

Answer 6

It provides the data routing paths. It will address and package the packet.

Question 7

What does FTP Stand for?

Answer 7

File transfer protocol – for transferring files between devices.

Question 8

What does HTTP Stand for?

Answer 8

Hypertext transfer protocol – Displaying web pages, html or php.

Question 9

What does HTTPS Stand for?

Answer 9

Hypertext transfer protocol secure – Displaying web pages securely

Question 10

What does SMTP Stand for?

Answer 10

Simple mail transfer protocol – Used for mail delivery

Question 11

What does POP Stand for?

Answer 11

Post office protocol – Receiving mail(Storing LOCALLY – NO LONGER ON SVR)

Question 12

What does IMAP Stand for?

Answer 12

Internet message access protocol – Receiving mail (Storing remotely and syncing)

Question 13

What does TCP stand for?

Answer 13

Transmission control protocol - is a standard that defines how to establish and maintain a network conversation via which application programs can exchange data.

Question 14

What does UDP stand for?

Answer 14

User Datagram Protocol - a protocol used in message transport or transfer. This is not connection based which means that one program can send a load of packets to another and that would be the end of the relationship.

Question 15

What does IP stand for?

Answer 15

Internet Protocol – Identifies the location of a device on the Internet. Routes individual packets from source to destination via routers.

Question 16

What is the advantages of the TCP/IP Layers?

Answer 16

TCP/IP is split into layers because decomposition means that:
• Complex problem can be broken into smaller, manageable, pieces

• Changes in one layer do not impact on other layers
• It provides a universal standard for hardware and software manufactures to follow
• Each layer carries out distinct functions which means that it avoids repetition of tasks.

Question 17

What is MAC Address filtering?

Answer 17

MAC address filtering allows you to define a list of devices and only allow those devices on your Wi-Fi network.

Question 18

What is a white list and what would it contain?

Answer 18

A white list is a list of people that are allowed to access the said thing, whether it is a network or just an area of the network.

Question 19

What is a firewall?

Answer 19

A firewall acts as a barrier between a trusted network and an untrusted network. A firewall controls access to the resources of a network through a positive control model. This means that the only traffic allowed onto the network is defined in the firewall policy; all other traffic is denied.

Question 20

What are the three topologies?

Answer 20

STAR, BUS, RING

Question 21

What is the best?

Answer 21

STAR

Question 22

What are the three networks?

Answer 22

WAN LAN PAN

Question 23

What is a Server?

Answer 23

A dedicated computer that delivers a certain function. Servers are often powerful custom made computers. An example of a server would be a file server. It provides a service.

Question 24

What is a client?

Answer 24

A client is often a computer which is connected to the network which accesses the server and the network resources.

Question 25

What is the communication medium

Answer 25

The communication medium is the medium in which the client is connected to the network. Guided = Cable Unguided = Wireless

Question 26

What is the network adapter?

Answer 26

This is the device that communicates with the other devices in the network.

Question 27

What is a router/WAP?

Answer 27

A router acts as a gateway to the network. A WAP also acts as a gateway but for wireless devices.

Question 28

What is a network resource?

Answer 28

Peripheral devices are shared such as printers that can access the network. Also a network share could be classed as a resource.

Question 29

What is a protocol?

Answer 29

A protocol is the way that the computers can communicate with each other such as TCP/IP.

Question 30

What is the star topology?

Answer 30

There is a PC or Switch/Router in the centre of the network that all of the PCs plug into. A star network consists of one central hub which acts as a conduit to transmit messages.

Question 31

What is the Bus topology?

Answer 31

A bus network is an arrangement in a local area network (LAN) in which each node (workstation or other device) is connected to a main cable or link called the bus. Performance issues.

Question 32

What is the ring network?

Answer 32

In a ring network each device (workstation, server, printer) is connected to two other devices, this forms a ring for the signals to travel around. Each packet of data on the network travels in one direction and each device receives each packet in turn until the destination device receives it.

Question 33

What should network diagrams include?

Answer 33

• Three PCs
• One shared device
• Servers
• Router Connecting devices to internet
• Topology specific devices
• Devices need a NIC