Fundamental Pt 2

Question 1

Why would you use a VLAN?

Answer 1

1. To separate different types of traffic.
2. VLANs can also be used for QoS.

Example:
A company may want their VOIP traffic to be on a separate VLAN.

Question 2

What is CRC?

Answer 2

CRC = Cyclical Redundancy Check

Its used for data integrity. It is a calculation which will detect accidental changes to raw data.

Question 3

On a LAN, a switch will direct packets to a end devices using what information?

Answer 3

MAC addresses

Question 4

What format are IPv4 addresses written in?

Answer 4

Dotted decimal notation

Question 5

What does DHCP stand for?

Answer 5

Dynamic Host Configuration Protocol

Question 6

What devices would use a static IP address and a dynamic IP address?

Answer 6

A server would use a static IP address whereas a client would be assigned a dynamic IP address.

Question 7

What is TTL

Answer 7

Time to live

This 8-bit field indicates how many router hops a datagram can traverse before it is thrown away.

Question 8

Describe in simple terms what encapsulation is?

Answer 8

Encapsulation is the process of taking data from one protocol and translating it into another protocol, so that the data can continue across a network.

Question 9

What two sections make up an IP address?

Answer 9

1. The host ID

2. The network ID

Question 10

Which organisation owns the IP addresses with 9 in the first Octet?

Answer 10

IBM

9.100.100.100

Question 11

What is the network ID for this IP address?

9.100.100.100

Answer 11

The network ID would be ‘9’

Question 12

Next up = the different type of classes for IP addresses

Answer 12

Next up = the different type of classes for IP addresses