2-Protocols

Question 1

What is networking?

Answer 1

When two or more devices are connected for data sharing or resources, we call it networking

Question 2

what is the different between networking and internetworking?

Answer 2

• In networking (LAN) all devices are compatible with each other
• It may or may not be the case in internetworking

Question 3

what is a protocol?

Answer 3

is a set of rules that partners in communication use when they communicate

Question 4

what dose TCP/IP stand for?

Answer 4

Transmission Control Protocol/Internet Protocol

Question 5

The four Layer Network Model consist of:(in order)

Answer 5

1-Aplication(top layer)
2-Transport
3-Internet (IP Layer)
4-Link(bottom layer)

Question 6

example of Application layer protocols

Answer 6

HTTP, FTP, SMTP, POP and DNS

Question 7

example of Transport layer protocols

Answer 7

TCP and UDP

Question 8

examples of Internet layer protocols

Answer 8

IPv4(Internet Protocol version 4) and Ipv6

Question 9

what’s a Link layer?

Answer 9

• it’s the lowest layer, responsible for both the physical transmission across media (wires, wireless) and establishing logical links
• It handles issues like packet creation, transmission, reception and error detection, collisions, line sharing and more.

Question 10

What’s a Internet layer?

Answer 10

routes packets between communication partners across networks.

Question 11

What’s a Internet Protocol?

Answer 11

The Internet uses the Internet Protocol (IP)
addresses to identify destinations on the Internet

Every device connected to the Internet has an IP address, which is a numeric code that is meant to uniquely identify it

Question 12

data transmission steps:

Answer 12

First, the data is broken into packets formatting according to the Transmission Control Protocol (TCP)

Secondly, each packet is acknowledged back to the sender so in the event of a lost packet, the transmitter will realize a packet has been lost since no ACK arrived for that packet

Finally that packet is retransmitted, and although out of order, is reordered at the destination

Question 13

what dose a Transport layer do?

Answer 13

ensures transmissions arrive, in order, and without error

Question 14

example of the Link layer is

Answer 14

the MAC address

Question 15

Application Layer

Answer 15

the level of protocols familiar to most web developers

Application layer protocols implement process-to-process communication and are at a higher level of abstraction in comparison to the low-level packet and IP addresses protocols in the layers below it