Tag - physical layer

what is Connection oriented and Connectionless

Difference Between Connection oriented vs Connection less 

Connection-oriented means that a connection (a virtual link) must be established before data can be exchanged. This can guarantee that data will arrive, and in the same order it was sent. It guarantees delivery by sending acknowledgements back to the source when messages are received.

Example

TCP is an example of an connection-oriented transport protocol.

A common example of connection-oriented communication is a telephone call: you call, the ‘destination’ picks up the phone and acknowledges and you start talking (sending data). When a message or a piece of it doesn’t arrive, you say: “What!?” and the sender will retransmit the data.

Connectionless is the opposite of connection-oriented; the sender does not establish a connection before it sends data, it just sends without guaranteeing delivery.

Example

UDP is an example of an connectionless transport protocol.

Application Layers

Host A————————————Host B

Application layer——-data————Application layer

Presentation layer—–data————Presentation layer

Session layer———–data————Session layer

Transport layer—–segments——–Transport layer

Network layer   ——packets———-Network layer

Data-link layer——-frames———–Data-link layer

Physical layer———–bits————-Physical layer

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CCNA Interview Questions

After Review CCNA course we Conclude some short Questions with Answers

CCNA Interview Question Part 1

CCNA Interview Question Part 2

CCNA Interview Question Part 3

CCNA Interview Question Part 4

CCNA Interview Question Part 5

CCNA Interview Question Part 6

CCNA Interview Question Part 7

CCNA Interview Question Part 8

CCNA Interview Question Part 9

CCNA Interview Question Part 10

CCNA Interview Question Part 11

CCNA Interview Question Part 12

CCNA Interview Question Part 13

CCNA Interview Question Part 14

Interview Question of CCNA Part 2

11- What is the difference between bus topology and HUB?

Hub is Centralized device ( series ) .Bus topology is Decentralized device (in parallel)

12- Is hub intelligent device?
No; because it not use header

12- Which protocol switch use for filling its MAC-Table ?
ARP – Address Resolution Protocol

13- What is CAM ?
Content Address Memory. its another name of MAC address table.

14- Which type for communication switch do?
In case of any new event switch do broadcast, after that always do Unicast.

15- If line down and protocol also down; in this case which layer move problem?
Physical Layer – Layer 1

16 – If line up, but protocol down which layer should be troubleshot?
Data link problem – Layer 2

17-On which base switches take decisions?
Mac Address

18- How ARP brings MAC address for switch?
Through Broadcast

19- How many collision domains are in switch?
Equal number of ports

20- How many broadcast domains are in Switch ?
One

CCNA Interview Question Part 1

CCNA Interview Question Part 2

CCNA Interview Question Part 3

CCNA Interview Question Part 4

CCNA Interview Question Part 5

CCNA Interview Question Part 6

CCNA Interview Question Part 7

CCNA Interview Question Part 8

CCNA Interview Question Part 9

CCNA Interview Question Part 10

CCNA Interview Question Part 11

CCNA Interview Question Part 12

CCNA Interview Question Part 13

CCNA Interview Question Part 14

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