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TCP/IP Interview Questions & Answers - Learning Mode

TCP/IP Interview Questions & Answers - Learning Mode

TCP/IP (Transmission Control Protocol/Internet Protocol) is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network (either an intranet or an extranet). It defines how electronic devices (like computers) should be connected over the Internet, and how data should be transmitted between them. Transmission Control Protocol: TCP is responsible for breaking data down into small packets before they can be sent over a network, and for assembling the packets again when they arrive. Internet Protocol: IP takes care of the communication between computers. It is responsible for addressing, sending and receiving the data packets over the Internet.

Try TCP/IP Interview Questions & Answers - Exam Mode

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TCP/IP Interview Questions & Answers - Learning Mode
Try TCP/IP Interview Questions & Answers - Exam Mode
Question: What is the full form of OSI and TCP/IP model?

Answer: * OSI stands for = Open Systems Interconnection (OSI) model
* TCP/IP stands for = Transmission Control Protocol/ Internet Protocol Source:
Question: TCP/IP has how many layers?

Answer: 5 layers: Network layer, Internet layer, Transport layer and Application layer. Source:
Question: What are the networking protocol options for the Windows clients if for some reason you do not want to use TCP/IP?

Answer: NWLink (Novell), NetBEUI, AppleTalk (Apple). Source:
Question: What is the Role of TCP/IP in data transmission from source to destination?

Answer: Yes, lots of them, far too many to list here. Uri Raz maintains a
TCP/IP bibliography (the "TCP/IP Resources List") that is posted
to the comp.protocols.tcp-ip newsgroup on a monthly basis. It is
available on the Web at
<> and
or can be retrieved by anonymous FTP from
Question: What is RIP?

Answer: RIP, short for Routing Information Protocol is used by routers to send data from one network to another. It efficiently manages routing data by broadcasting its routing table to all other routers within the network. It determines the network distance in units of hops. Source:
Question: What are the differences between OSI and TCP/IP model?

Answer: mportant differences are:

OSI is a reference model and TCP/IP is an implementation of OSI model.

OSI has 7 layers whereas TCP/IP has only 4 layers The upper 3 layers of the OSI model is combined on the TCP/IP model.

OSI has: physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer TCP/IP has : Network layer, Internet layer, transport layer and application layer. Source:
Question: What are Gateways in case of TCP/IP?

Answer: Gateways provide connectivity between two or more network segments. It is usually a computer that runs the gateway software and provides translation services. This translation is a key in allowing different systems to communicate on the network. Source:
Question: Explain what is consignment stock?

Answer: A VLAN is required because at switch level there is only one broadcast domain, it means whenever new user is connected to switch this information is spread throughout the network. VLAN on switch helps to create separate broadcast domain at switch level. It is used for security purpose Source:
Question: What is the Major disadvantage of Star Topology in case of TCP/IP?

Answer: One major disadvantage of star topology is that once the central hub or switch get damaged, the entire network becomes unusable. Source:
Question: How many layers are there under TCP/IP?

Answer: There are four layers: the Network Layer, Internet Layer, Transport Layer and Application Layer. Source:
Question: What is the difference between CSMA/CD and CSMA/CA?

Answer: CSMA/CD, or Collision Detect, retransmits data frames whenever a collision occurred. CSMA/CA, or Collision Avoidance, will first broadcast intent to send prior to data transmission. Source:
Question: What is ICMP?

Answer: ICMP is Internet Control Message Protocol. It provides messaging and communication for protocols within the TCP/IP stack. This is also the protocol that manages error messages that are used by network tools such as PING. Source:
Question: In Access sequence what is the importance of requirement field?

Answer: The main task of ARP or Address Resolution Protocol is to map a known IP address to a MAC layer address. Source:
Question: What is SMTP?

Answer: SMTP is short for Simple Mail Transfer Protocol. This protocol deals with all Internal mail, and provides the necessary mail delivery services on the TCP/IP protocol stack. Source:
Question: How is data send by IP layer?

Answer: IP layer PDU is "packet". So, data is send as packet. Source:
Question: What is the port number of Telnet and DNS?

Answer: Telnet = 23 and DNS = 53 Source:
Question: What is TCP/IP model?

Answer: TCP/IP model is an implementation of OSI reference model. It has five layers. They are: Network layer, Internet layer, Transport layer and Application layer. Source:
Question: What are the layers of the OSI reference model?

Answer: There are 7 OSI layers: Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer and Application Layer. Source:
Question: Transitive Attributes?

Answer: SLIP, or Serial Line Interface Protocol, is actually an old protocol developed during the early UNIX days. This is one of the protocols that are used for remote access. Source:
Question: What is DHCP (Dynamic Host Configuration Protocol)?

Answer: DHCP is short for Dynamic Host Configuration Protocol. Its main task is to automatically assign an IP address to devices across the network. It first checks for the next available address not yet taken by any device, then assigns this to a network device Source:

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