7.2.8 The role and characteristics of common components of a network

Question 1

Explain:

Internet Service Providers

Answer 1

Companies who privately own the core networks who have contracts with each other to form the large, global network

Question 2

Fill The Blank:

Businesses and individuals hold a …………… with an individual …… to acces the entire …………..

Answer 2

Contract, ISPs, Internet,

Question 3

Fill The Blank:

ISPs use the ……………. layer and …………….. layer of the TCP/IP model to make computer to computer connections and transmit data between them

Answer 3

Internet, Transport

Question 4

Explain:

Briefly, the 3 tiers of ISPs

Answer 4

Tier 3: Local ISPs, businesses and homeowners have contracts for these
Tier 2: Acts as a go-between Tier 1 and 3 ISPs, often regional or country-wide like Vodafone - act same as Tier 1 ISPs but with a wider reach for internet access and will charge tier 3 ISPs
Tier 1: Global reach across internet, charge tier 2 ISPs

Question 5

Explain:

Router

Answer 5

Manage communication between different devices on a network and allows connected devices to access the internet

Question 6

Fill The Blank:

A wired router requires devices to be connected using ……………….. cables whereas a …………….. router allows for wireless connectivety (but likely with some physical connections available too)

Answer 6

Ethernet, Wireless

Question 7

Fill The Blank:

Routers use the ….. …………………. of a connected device to deliver packets to the correct device

Answer 7

IP Addresses

Question 8

State:

The layer in the OSI model routers operate, and the 3 layers they use

Answer 8

on the network layer and use the network, physical and data-link layers

Question 9

Explain:

Why routers are known as self-learning devices

Answer 9

Will automatically identify new devices connected to the network and ensure additonal devices know of its existence

Question 10

Fill The Blank:

Routers support ………………. and ……………………….

Answer 10

Filtering, Encapsulation

Question 11

True or False:

A network switch is required for internet access

Answer 11

False - a network switch is not required for internet access, but a router is

Question 12

State:

Where a network switch is used

Answer 12

Used in large businesses’ networks and data centres where the devices are connected using ethernet cables

Question 13

Fill The Blank:

A switch is used to connect devices …………… in a network and will only transmit packages to the device data is ………………… for

Answer 13

Within, Intended

Question 14

Fill The Blank:

A layer .. switch uses the ………….. ……………… ………… (…….) address of each device so that is can send the data to the correct device and works in the ……..-……….. layer of the OSI model

Answer 14

Media Access Control (MAC), Data-Link

Question 15

Fill The Blank:

A layer .. switch works in the …………….. layer of the OSI modeland uses the ….. addresses of the destination device to route packages

Answer 15

3, Network, IP

Question 16

Fill The Blank:

Network switches that operate in the ………………. layer of the OSI model are usually used to support ………….

Answer 16

Network, VLANs