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Theory Question Answer 21 To 30

 

Q21 .  

What Is A Lan Network Define Some Details ?

Answer : 

A LOCAL AREA NETWORK IS A COLLECTION OF DEVICES CONNECTED TOGETHER IN ONE PHYSICAL LOCATION, SUCH AS AN OFFICE OR HOME BUILDING.

A LAN IS USED TO CONNECT THE COMPUTER AND OTHER NETWORK DEVICES SO THAT THE DEVICE CAN COMMUNICATE WITH EACH OTHER TO SHARE RESOURCES.

LAN NETWORK RANGE IS 1 TO 10 KILO METER.

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Q22.

Which Series Of Switch  Is Called A Layer 2 Switch ? 

Answer : 


Layer 2 Switches Only Operate At The Data Link Layer (Layer 2) Of The OSI Model,


Layer 2 Switches Forward Data Frames Based On The MAC Addresses Of The Source And Destination Devices. They Do Not Look At The IP Addresses Of The Devices.


LAYER 2 SWITCHES IS LESS EXPENSIVE AND EASY TO CONFIGURED.


2960 SERIES SWITCH IS CALLED A LAYER 2 SWITCH.


ANOTHER NAME LAYER 2 SWITCH IS ACCESS LAYER SWITCH.


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Q23.

What Is Diffrence Between Layer 2 And Layer 3 Switch. Define Shortly ? 

Answer : 

The Main Difference Between Layer 2 And Layer 3 Switches Is That Layer 2 Switches Only Operate At The Data Link Layer (Layer 2) Of The OSI Model,

While Layer 3 Switches Operate At Both The Data Link Layer And The Network Layer (Layer 3) Of The OSI Model.

Layer 2 Switches Forward Data Frames Based On The MAC Addresses Of The Source And Destination Devices. They Do Not Look At The IP Addresses Of The Devices.

Layer 3 Switches, On The Other Hand, Forward Data Packets Based On The IP Addresses Of The Source And Destination Devices. They Can Also Route Traffic Between Different Networks.

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Q24.

Which Series Of Switch  Is Called A Layer 3 Switch ? 

Answer : 

While Layer 3 Switches Operate At Both The Data Link Layer And The Network Layer (Layer 3) Of The OSI Model.

Layer 3 Switches, On The Other Hand, Forward Data Packets Based On The IP Addresses Of The Source And Destination Devices. They Can Also Route Traffic Between Different Networks.

3560 AND 3650 AND 3750 SERIES SWITCH IS CALLED A LAYER 3 SWITCH.

ANOTHER NAME LAYER 3 SWITCH IS MULTILAYER LAYER SWITCH.

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Q25.

Which Layer In Osi Refrence Model.  Just Define Name ?

Answer : 

ISO REPRESENT A 1947 MORE THAN WORK AND AGAIN REPRESENTS A ISO IN 1977 AND MORE THAN WORK AN REPRESENT  IN 1983 A OSI REDFRENCE MODEL.

HIS MODEL REPRESENT A 7 LAYER.  OSI MEANS  (OPEN SYSTEMS INTERCOMMUNICATIO).


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Q26.

Who Is Network Model That Practical In Real Life ? 

Answer : 

TCP/IP MODEL IS REAL LIFE IMPLEMENT.

TCP/IP MODEL LAYER IS.  1. APPLICATION LAYER,  2.  TRANSPORT LAYER,  3.  INTERNET LAYER,   4.  LINK LAYER

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Q27.

Define Shortly About His Star And Hybrid Topology ? 

Answer : 

STAR TOPOLOGY

IN A STAR TOPOLOGY, ALL END DEVICES ARE CONNECTED TO A CENTRALIZED NETWORK DEVICE.

THAT CENTRALIZED DEVICE CAN BE A ROUTER OR HUB OR SWITCH.

MESH TOPOLOGY

WHEN TWO OR MORE TOPOLOGIES ARE COMBINED, IT IS CALLED A HYBRID TOPOLOGY.

AS IF RING TOPOLOGY AND MESH TOPOLOGY ARE COMBINED IN THE THEN IT WILL BE CALLED HYBRID TOPOLOGY.



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Q28.

What Is A Protocol  ? 

Answer : 

THE SET OF RULES AND REGULATION THEY IS USED FOR COMMUNICATION IS CALLED PROTOCOL.

IN COMPUTER NETWORKS, PROTOCOLS ARE USED TO ENSURE THAT DATA IS TRANSMITTED RELIABLY AND EFFICIENTLY BETWEEN DEVICES.

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Q29.

What Is A Server And Which  Services That Provide It ? 

Answer : 

A SERVER IS A COMPUTER PROGRAM OR DEVICE THAT PROVIDES A SERVICE TO ANOTHER COMPUTER PROGRAM AND ITS USER, ALSO KNOWN AS THE CLIENT. THIS ARCHITECTURE IS CALLED THE CLIENT-SERVER MODEL.

SERVICES : FTP , DNS , HTTP , HTTPS , DHCP.

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Q30.

What Is a Port Number Of His Protocols ? 

Ftp , Http , Https , Dns , Telnet , Ssh , Pop , IMAP , TFTP

Answer : 

PORT NO OF HIS PROTOCOL : 

FTP  21

HTTP   80

HTTPS    443

DNS    53

TELNET   23

SSH    22

POP    110

IMAP   143

TFTP    69

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