Networking test

Question 1

What is a UTP (unshielded twisted pair)

Answer 1

Cable used to connect devices to network, 4 pairs of wires that are twisted together

Question 2

What is STP (shielded twisted pair

Answer 2

Network cabllin like UTP but has additional shielding to reduce elctromagnetic interference

Question 3

What is fibre optic

Answer 3

Use light to transmit data over long distances at high speeds

Question 4

Single vs Multi mode fibres

Answer 4

Single: Long distance up to 100gbps
Multi: Shorter distances at lower speeds for cheaper

Question 5

Coaxial cable

Answer 5

central conductor surrounded by a shield and insulating layer, mostly used for cable tvs

Question 6

2.4ghz
5ghz
6ghz

Answer 6

2.4 = good coverage but susceptible to interference
5 = high speeds, less interference, short range
6 = fastest but very low range

Question 7

Modem

Answer 7

Converts signals from one device to another so other can read

Question 8

Router

Answer 8

connects networks together and routes data between them

Question 9

Switch

Answer 9

connects devices together and routes data between them

Question 10

Gateway

Answer 10

connects local netweork to a larger network etc internet

Question 11

WAP

Answer 11

wireless devices to connect to wired network

Question 12

Firewall

Answer 12

Monitors income and outgoing traffic and blocks traffic

Question 13

DOD TCP/IP MODEL

Answer 13

Application -> transport - > network -> network access layer

Question 14

Application layer

Answer 14

Network services like HTTPS, HTTP

Question 15

Transport layer

Answer 15

Reliable data transfer like TCP

Question 16

Internet layer

Answer 16

addressing and rouiting of data packets accross network like IP

Question 17

network interface layer

Answer 17

transmitting data packets over physical network etc ethernet

Question 18

What is an IP address

Answer 18

unique numerical identifier assignerd to every device on a network using internet layer

Question 19

IPV 4 IPV 6

Answer 19

IPV4 = 32 bit adress with 4.3 billions max address
IPV6 = 128 bit address with unlimited addresses

Question 20

Subnet masks

Answer 20

Network = used to identify network
Host = used to identiyfy individual device on network
Subnet mask is a 32 bit value used to determine which part of IP is host and which is network

Question 21

Factors that affect network performance

Answer 21

• Bandwith, network design, data collision

Question 22

Bandwidth

Answer 22

Amount of data that can be transmitted over a network connection in a given amount of time

Question 23

Ways to reduce data collision

Answer 23

Switches and routers by checking if trasnmitssion is in use

Question 24

Excess broadcast traffic

Answer 24

Messages that are sent to all devices on a network

Question 25

What is OSI

Answer 25

framework used to understand network interactions

Question 26

OSI MODEL

Answer 26

Application –> Presentation –> Session–> Transport —-> network—-> data link—> physical layer

Question 27

Header

Answer 27

Refers to a block of info attacked to data packets

Question 28

Application layer

Answer 28

Enables access to network services for end user applications, e.g email for HTTP

Question 29

Presentation layer

Answer 29

Transforms data to provide standard interface for application layer, encypts and compresses data aswell

Question 30

Session layer

Answer 30

Manages communication sessions between applications

Question 31

Transport layer

Answer 31

Reliable, transparent transfer of data. Manages error detection and recovery , TCP

Question 32

Network layer

Answer 32

Manages device addressing for best path IP V4 and 6

Question 33

Data link layer

Answer 33

Provides node to node data transfer e.g switch

Question 34

Physical layer

Answer 34

Transmits raw bits over a physical medium e.g cables

Question 35

Network topology

Answer 35

Layout of a network on how different nodes are connected

Question 36

Star topology

Answer 36

Every node is conncted to a central hub which offers high perfomance

Question 37

Mesh topology

Answer 37

Every node is connected to every other node which offers fault tolerance

Question 38

Hybrid topology

Answer 38

Combines two or more different topologies to meet specific needs offers security and performance