Basics

Question 1

What is EAP-TLS?

Answer 1

Extensible authentication protocol - transport layer security

Question 2

What does a hub do?

Answer 2

Traffic goes into one port and is repeated to every port

Question 3

Define a switch?

Answer 3

Sends data to a particular destination

Question 4

What does a router do?

Answer 4

Route traffic between IP subnets

Question 5

What is the role of a WAP?

Answer 5

Extends the ethernet wire to a wireless network

Question 6

What does a modem do?

Answer 6

Converts analog to digital

Question 7

IDS/IPS identification techniques include?

Answer 7

Signature based
Anomaly based
Behaviour based
Heuristic based

Question 8

What do packer shapers do?

Answer 8

Control bandwidth usage

Question 9

How does a VPN work?

Answer 9

It’s an encrypted tunnel between the device and VPN concentrator

Question 10

Explain PPP (point to point) protocol?

Answer 10

Involves authentication, error detection but no encryption

Question 11

How does an SSL VPN work?

Answer 11

Uses common SSL protocol, client to site communication.

Question 12

What does RADIUS enable a user to do?

Answer 12

To use the same credentials that they use in every other part of the organisation when using the VPN

Question 13

Describe layer 1 (physical) of the OSI model.

Answer 13

Physical/electrical.

- hubs

Question 14

Describe layer 2 (data link) of the OSI model.

Answer 14

Getting data from one point to another

- switches

Question 15

Describe layer 3 (network) of the OSI model.

Answer 15

Network routing functions

- routers

Question 16

Describe layer 4 (transport) of the OSI model.

Answer 16

Management and control

- TCP, firewalls

Question 17

Describe layer 5 (session) of the OSI model.

Answer 17

Traffic control

- controls connections between computers

Question 18

Describe layer 6 (presentation) of the OSI model.

Answer 18

Translates data into acceptable format

Question 19

Describe layer 7 (application) of the OSI model.

Answer 19

Interface between applications and network

- SMTP, HTTP, FTP

Question 20

What is the wireless standard?

Answer 20

802.11

Question 21

What is DHCP addressing?

Answer 21

Issues IP address

Question 22

What is the wireless standard?

Answer 22

802.11

Question 23

What is the ethernet standard?

Answer 23

802.3

Question 24

What is encapsulation?

Answer 24

Wrapping the data with layers of control

Question 25

What is decapsulation?

Answer 25

Opening up the packeted data

Question 26

What is baseband?

Answer 26

Single cable

Question 27

What is broadband?

Answer 27

Sending multiple signals over different frequencies

Question 28

What is multiplexing?

Answer 28

Taking loads of data and squishing it into a single stream and then letting it all out at the end

Question 29

What are the 4 layers of the TCP/IP model?

Answer 29

Application, transport, internet, link

Question 30

What is different about the application and transport layer of the TCP model?

Answer 30

They have no idea what is happening at the network levels

Question 31

What is a distribution frame?

Answer 31

Used in patch panel room, holds transport media

Question 32

What is a MDF?

Answer 32

Central point of the network (end point for WAN links)

Question 33

What is a WAN?

Answer 33

Wide area network, extends over a large geographical area

Question 34

What is a disadvantage of using the OSPF protocol?

Answer 34

Processor intensive

Question 35

What is an advantage of using OSPF?

Answer 35

It’s a link state algorithm - constructs a map showing which nodes connect to other nodes. Low link overhead - doesn’t take up a lot of computing time

Question 36

What is true for using checksums?

Answer 36

Allows correction of errors

Question 37

Why does contention in a network cause a slow response for users?

Answer 37

Data has to be retransmitted

Question 38

What is static routing?

Answer 38

Where a router uses manually configured path entry

Question 39

When would it be preferable to use static routing?

Answer 39

Where the network needs to be resilient

Question 40

What is an advance of static routing?

Answer 40

Low processor overhead

Question 41

What is dynamic routing?

Answer 41

A network technique where routers select paths according to real life changes

Question 42

What is a disadvantage to dynamic routing?

Answer 42

It is less secure

Question 43

What is bandwidth?

Answer 43

The maximum data throughput of a communication path

Question 44

What is traffic congestion?

Answer 44

A network node is carrying more data than it can handle

Question 45

What error technique could give a false positive result?

Answer 45

Parity

Question 46

Where are errors made in the physical layer corrected?

Answer 46

Data link layer

Question 47

Why would you add a static route to a dynamic router?

Answer 47

To limit traffic nodes

Question 48

What effect does contention have?

Answer 48

Latency is increased

Question 49

What is traffic control concerned with?

Answer 49

Increasing connection speed

Question 50

What’s the advantage of using static routing for a small network?

Answer 50

Increased efficiency

Question 51

What is an attribute of the UDP protocol?

Answer 51

Does not retransmit

Question 52

Which layers in the OSI model are equivalent to the application layer in TCP model?

Answer 52

Application Session Presentation

Question 53

What is RIPv1?

Answer 53

Classfull routing protocol. Broadcast the entire routing table periodically

Question 54

What is RIPv2v

Answer 54

Classless routing protocol

Question 55

What does RIPv2 do?

Answer 55

Supports IPv6