1.3 Network Protocols and Layers

Question 1

What is an IP address?

Answer 1

IP address is a unique address assigned to each device in a network.

Question 2

What is the difference between IPv4 and IPv6 addressing?

Answer 2

In IPv4, each device is assigned a 32-bit address. Whereas in IPv6, each device is assigned a 128-bit address.

Question 3

What is static IP addressing?

Answer 3

IP addresses assigned by a network administrator, which remain unused when the device is not in use is static IP addressing.

Question 4

What is dynamic IP addressing?

Answer 4

IP addresses assigned by DHCP, which can be reused when the device is not in use is dynamic IP addressing.

Question 5

What are the contents of a data packet?

Answer 5

Source, destination, packet sequence, data and error checking.

Question 6

List few languages used to create and update web pages.

Answer 6

HTML, XML and CSS

Question 7

What is https?

Answer 7

A protocol that is a secured form of http. It is used in banking websites.

Question 8

What are cascaded style sheets (CSS) used for?

Answer 8

CSS is used to edit the appearance of the HTML components such as buttons, text boxes, etc.

Question 9

List some protocols used for email communication.

Answer 9

SMTP, POP3 and IMAP.

Question 10

What are the different layers of TCP/IP suite of protocols?

Answer 10

Application layer
Transport layer
Internet layer
Link layer

Question 11

What is the function of an application layer?

Answer 11

This layer is responsible for ensuring that the data supplied by the sender from his application can be viewed at the receiver’s end using his application.

Question 12

What is the function of a transport layer?

Answer 12

Segmentation, sending acknowledgements ,requesting retransmission in case of missed packets determining the communication protocol, size of packets and data speed.

Question 13

What is the function of an Internet layer?

Answer 13

Identifies sender’s and receiver’s addresses. Routes the data packet from sender to receiver.

Question 14

What is the function of a link layer?

Answer 14

Error detection, hardware addressing, media access control and defining physical layer standards.

Question 15

What is the significance of adding information at each layer of TCP/IP stack?

Answer 15

This information will be used by the receiver to process the data packets and retrieve the information correctly.

Question 16

What is encapsulation?

Answer 16

Encapsulation is the process of adding information to data in each layer of TCP/IP stack