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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

What Is The Difference Between Flow Control And Error Control?

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Error Controls the process of detecting and CORRECTING BOT the bit and packet level error. While flow control is a mechanism to ensure the efficient delivery of Data. Flow control is agreeing on the MINIMUM AMOUNT of data that a receiver can HANDLE at a time.

Error Controls the process of detecting and correcting bot the bit and packet level error. While flow control is a mechanism to ensure the efficient delivery of Data. Flow control is agreeing on the minimum amount of data that a receiver can handle at a time.
Discussion
2.

What Is The Way To Establish A Tcp Connection?

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TCP CONNECTION is ESTABLISHED USING three-way HANDSHAKE.

TCP Connection is established using three-way Handshake.
Discussion
3.

Differentiate Between Forward Lookup And Reverse Lookup In Dns?

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Forward LOOKUP: NAME to IP RESOLUTION

Reverse Lookup: IP to Name resolution;

Forward Lookup: Name to IP resolution

Reverse Lookup: IP to Name resolution;
Discussion
4.

Which Layer Is Closer To The User?

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From SENDER point of view, APPLICATION Layer is CLOSEST and from RECEIVER point of view Pgysical Layer is closest.

From sender point of view, Application Layer is closest and from Receiver point of view Pgysical Layer is closest.
Discussion
5.

Dns Uses Which Protocol? Why?

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DNS USES both TCP and UDP

DNS uses both TCP and UDP
Discussion
6.

Which Layer Is Responsible For Creating, Managing And Terminating Sessions Between Applications?

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SESSION LAYER

Session Layer
Discussion
7.

Which Layer Defines How Data Is Formatted, Presented, Encoded,and Converted For Use On The Network ?

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PRESENTATION LAYER

Presentation Layer
Discussion
8.

At Which Layer Is Routing Implemented, Enabling Connections And Path Selection Between Two End Systems. ?

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NETWORK LAYER

Network Layer
Discussion
9.

Which Layer Is Responsible For Converting Data Packets From The Data Link Layer Into Electrical Signals ?

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PHYSICAL LAYER

Physical Layer
Discussion
10.

Mac Address Works On Which Layer ? What Are The Differences Of Mac Sublayer And Llc Sublayer?

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MAC works at DATA LINK LAYER. Media ACCESS CONTROL provides physical addressing while Logical Link Control provides error detection, using Ethernet trailer field frame check sequence (FCS). It is 4 bytes field. When a sending device SENDS a data it put the data in a mathematical algorithm and it gets a product, sending device puts the product in FCS. When a RECEIVING device receive a data it also put the data in same mathematical algorithm and get a product. If both products are same, Frame is accepted or else discarded.

MAC works at DATA LINK LAYER. Media Access Control provides physical addressing while Logical Link Control provides error detection, using Ethernet trailer field frame check sequence (FCS). It is 4 bytes field. When a sending device sends a data it put the data in a mathematical algorithm and it gets a product, sending device puts the product in FCS. When a receiving device receive a data it also put the data in same mathematical algorithm and get a product. If both products are same, Frame is accepted or else discarded.
Discussion
11.

Which Layer Manages Device Addressing, Tracks The Location Of Devices On The Network, And Determine The Best Way To Move Data ?

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Network

Network
Discussion
12.

Which Layer Provides The Physical Transmission Of The Data And Handless Error Notification, Network Topology, And Flow Control ?

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DATA LINK LAYER

Data Link Layer
Discussion
13.

Which Layer Segments And Resembles Data Into A Data Stream ?

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Transport

Transport
Discussion
14.

Which Layer Is Responsible For Keeping The Data From Different Applications Separate On The Network ?

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Session

Session
Discussion
15.

Which Layer Combines Bits Into Bytes And Bytes Into Frames, Uses Mac Addressing, And Provide Error Detection ?

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DATA LINK LAYER

Data Link Layer
Discussion
16.

Which Layer Specifies Voltage, Wire Speed, And Pinout Cables And Moves Bits Between Devices ?

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Physical

Physical
Discussion
17.

Which Layer Provides Logical Addressing That Routers Will Use For Path Determination ?

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NETWORK LAYER

Network Layer
Discussion
18.

What Is The Port Number Of Ftp (data) And Ftp?

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FTP port number 20 (DATA); 21 for Control

FTP port number 20 (Data); 21 for Control
Discussion
19.

Which One Is Reliable – Tcp Or Udp ?

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TCP is RELIABLE

TCP is reliable
Discussion
20.

What Is Crc? Which Layer Crc Works ?

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Cyclic REDUNDANCY Check is used to detect the ERRORS in NETWORK. It works at Data Link Layer (LLC Sub Layer).

Cyclic Redundancy Check is used to detect the errors in network. It works at Data Link Layer (LLC Sub Layer).
Discussion
21.

Give Some Example For Protocols Work At Application Layer ?

Answer»

APPLICATION Layer Protocols are HTTP, HTTPs, TELNET, SSH, DNS, FTP, TFTP, DHCP, RIP

Application Layer Protocols are HTTP, HTTPs, Telnet, SSH, DNS, FTP, TFTP, DHCP, RIP
Discussion
22.

In Which Layer Term “segments” Is Used ?

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SEGMENTS are USED at TRANSPORT LAYER

Segments are used at Transport Layer
Discussion
23.

In Which Layer Term “packets” Is Used ?

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PACKETS are PDU of NETWORK LAYER

Packets are PDU of Network Layer
Discussion
24.

In Which Layer Term “frames” Is Used ?

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FRAMES are PDU of DATA LINK LAYER

Frames are PDU of Data Link Layer
Discussion
25.

What Is The Port No Of Smtp And Pop3?

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POP3 = 110; SMTP = 25

POP3 = 110; SMTP = 25
Discussion
26.

Which Service Use Both Tcp And Udp ?

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DNS USES both TCP and UDP

DNS uses both TCP and UDP
Discussion
27.

What Is The Port No Of Dns And Telnet?

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DNS = 53, TELNET = 23

DNS = 53, Telnet = 23
Discussion
28.

What Are The Difference Between Tcp And Udp?

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Following are differences in TCP and UDP:

TCP stands for “Transmission Control PROTOCOL”UDP stands for “User datagram Protocol”.

  • TCP is connection oriented protocol while UDP is connectionless protocol.
  • TCP is more reliable than UDP.
  • UDP is faster for data sending than TCP.
  • UDP makes error checking but no reporting but TCP makes checks for errors and reporting.
  • TCP provides guaranteed Delivery of Data but UDP has no guarantee.
  • HEADER size of TCP is 20 bytes while that of UDP is 8 bytes.
  • TCP has acknowledgement SEGMENTS but UDP has no acknowledgement.
  • TCP is used for APPLICATION that require high reliability but LESS time critical whereas UDP is used for application that are time sensitive but require less reliability.

Following are differences in TCP and UDP:

TCP stands for “Transmission Control Protocol”UDP stands for “User datagram Protocol”.
Discussion
29.

What Is The Role Of The Llc Sublayer In Data Link Layer?

Answer»

Logical Link CONTROL PROVIDES error DETECTION, using Ethernet trailer field frame check SEQUENCE (FCS).

Logical Link Control provides error detection, using Ethernet trailer field frame check sequence (FCS).
Discussion
30.

What Is A Window In Networking Terms?

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Window is the amount of segments SENT between two ACKNOWLEDGMENTS by TCP.

Window is the amount of segments sent between two acknowledgments by TCP.
Discussion
31.

Routers Work At Which Osi Layer?

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NETWORK LAYER

Network Layer
Discussion
32.

What Are The Responsibilities Of Transport Layer?

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Transport Layer has a LOT of function. Most important being,

  1. Multiplexing and De-Multiplexing
  2. Segmentation and Re-assembly
  3. FLOW Control
  4. Error Correction
  5. Connection ESTABLISHMENT
  6. SEQUENCING
  7. Acknowledgement
  8. 3 way Handshake

Transport Layer has a lot of function. Most important being,
Discussion
33.

What Are The Responsibilities Of Network Layer?

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ROUTING, IP ADDRESSING and Path DETERMINATION are the main responsibilities of Network Layer.

Routing, IP Addressing and Path determination are the main responsibilities of Network Layer.
Discussion
34.

What Are The Responsibilities Of Data Link Layer?

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Framing, ERROR detection, CRC and Physical ADDRESSING is the TASK of DLL.

Framing, Error detection, CRC and Physical Addressing is the task of DLL.
Discussion
35.

List The Layers Of Osi ?

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From top to bottom, OSI layers are, Application, PRESENTATION, Session, Transport, Network, DATA Link and PHYSICAL.

From top to bottom, OSI layers are, Application, Presentation, Session, Transport, Network, Data Link and Physical.
Discussion