networks

Question 1

+.LAN

Answer 1

local area network - a small geographic area where infrastructure is owned

Question 2

wan

Answer 2

A wide area network is created when LANs are connected , an example of a WAN is the internet

Question 3

explain what a vpn is

Answer 3

a network that can securely connect geographically unrelated computers via the internet.

Question 4

define latency (hint: packets, time)

Answer 4

time it takes for data to travel across the network

Question 5

error rate

Answer 5

amount of errors that happen during data transmission

Question 6

bandwidth

Answer 6

maximum rate of data trasfer

Question 7

transmission media

Answer 7

data can be carried away

Question 8

what is interference (hint: cables/switchs)

Answer 8

when cable or switch is close to electrical equipment

Question 9

client server

Answer 9

This type of network separates computers into one of two classifications - servers and clients
A server is a computer that manages and stores files, or one that provides services to other computers on the network. They control the network and allow other computers to share and communicate.

There is a hierachy, higher tier users get priority over lower tier users.
Best suited for a large company

zihans take:

managed by a server, devices connected are called clients

pros - easy to keep track of files/backup files/ and to update or install software

cons - expensive to set up, requires expertise and server dependence

Question 10

peer to peer (P2P)

Answer 10

In peer to peer, peers store their own files, which can be accessed by other peers on the network (like the school system)

In peer to peer, there is no hierachy chain, everyone gets the same level of priority
Also, p2p are best suited to smaller organisations

Question 11

Advantages of P2P

Answer 11

Easy file sharing
Reduced costs
Easily add new users

Question 12

Advantages of Client Server

Answer 12

Backups and network security is controlled centrally
Users can access shared data which is centrally controlled

Question 13

Disadvantages of P2P

Answer 13

Files and folders cannot be centrally backed up

Ensuring that viruses are not added to the network is the responsibility of each user
There is little security

Question 14

Disadvantages of Client Server

Answer 14

Specialists needed to setup
If any part of the network fails, alot of disruption can occur

Question 15

Factors that affect performance of a network

Answer 15

The number of devices on the network

Question 16

Cloud advantages+disad

Answer 16

servers hosted on the internet

ad:
- do neded to buy and install software
- lower costs
- no need to upgrade software

disad:
- reliant on internet
- prone to hacking (Security)
- dont know where data is stored

Question 17

DNS

Answer 17

donaim name system

used to find computer which hosts website you look for

Question 18

list the advantages of a LAN

Answer 18

• enables digital communication between people
• enables sharing of information
• enables sharing of peripheral devices
• enables computers to be updated easily

Question 19

disadvantages of LAN

Answer 19

• requires expertise, can be costly
• security issues