network revision

Question 1

lan meaning

Answer 1

local area network

Question 2

wan meaning

Answer 2

wide area network

Question 3

pan meaning

Answer 3

personal area network

Question 4

NIC meaning

Answer 4

network interface card

Question 5

WAP meaning

Answer 5

wireless acess point

Question 6

what does a peer to peer network do?

Answer 6

there is no server, all the computers are connected

Question 7

what does a client server network do?

Answer 7

it uses a server to send info to other computers and outside appliances.

Question 8

what is the difference between the internet and www?

Answer 8

the internet is a series of globally connected networks and computers, whereas the www is a collection of data and information accessed via the internet.​

Question 9

how do you think information on a server in America reaches your laptop in the UK?​

Answer 9

underwater fibre optic cables

Question 10

list all the topologys

Answer 10

bus, star, ring, mesh

Question 11

which topology is the most secure?

Answer 11

mesh

Question 12

list packet headings

Answer 12

link layer, internet layer, transport layer, application layer

Question 13

what does the link layer do?

Answer 13

Electrical signalling​
Flow control​
Error detection
Network addressing — MAC addresses​
Transmitting datagrams between internet layers​

Question 14

what does the internet layer

Answer 14

IP header​
IP data​
Sending and receiving IP addresses​
Host-to-host routing and addressing​

Question 15

what does the transfer layer do

Answer 15

Protocol header and data​
Host-to-host communication​
UDP — connectionless​
TCP — connection-​
oriented

Question 16

what does the application layer do?

Answer 16

Data we want to transmit​
Application protocol — DNS, HTTP, etc.​
Prepares application protocols to move to transport layer​

Question 17

what is a network?

Answer 17

a set of devices connected for sharing data.

Question 18

what are the most important network criteria’s?

Answer 18

performance, reliability, security.

Question 19

what is the most secure network type?

Answer 19

mesh

Question 20

what is the least secure network type?

Answer 20

bus

Question 21

what are the pros and cons of a star network?

Answer 21

highly efficient, safe, no point to point connections.

expensive, immobile, cables can get damaged easially.

Question 22

pro and cons of a ring network?

Answer 22

low chance of packet collisions, don’t need a server, high speed.
if you lose one device it all goes down, expensive, bandwidth gets shared

Question 23

pros and cons of circuit switching.

Answer 23

fixed bandwidth, no waiting time at switches

Question 24

pros and cons of packet switching

Answer 24

more efficient than circuit switching, reduces lost data packet, takes long times to establish a connection.

Question 25

which is faster, ethernet or wifi? why?

Answer 25

ethernet because of the wired connection.

Question 26

what does TCP/IP do?

Answer 26

it specifies how data is transferred over the internet and identifies how data should be split into packets.

Question 27

whats more secure http or https?

Answer 27

https, hyper text transfer protocol secure.

Question 28

what is ftp

Answer 28

file transfer protocol enables the transfer of files though the cloud