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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 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 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: TCP/IP has how many layers?

Answer: 5 layers: Network layer, Internet layer, Transport layer and Application layer. Source:
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: 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: 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 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 is Authentication in case of TCP/IP Protocol?

Answer: Authentication is the process of verifying a user?s credentials before he can log into the network. It is normally performed using a username and password. This provides a secure means of limiting the access from unwanted intruders on the network. Source:
Question: What is a Link in case of TCP/IP?

Answer: A link refers to the connectivity between two devices. It includes the type of cables and protocols used in order for one device to be able to communicate with the other. Source:
Question: What is TCP/IP

Answer: TCP/IP is a name given to the collection (or suite) of networking protocols that have been used to construct the global Internet. The protocols are also referred to as the DoD (dee-oh-dee) or Arpanet protocol suite because their early development was funded by the Advanced Research Projects Agency (ARPA) of the US Department of Defense (DoD). 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 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: What is the number of network IDs in a Class C network?

Answer: For a Class C network, the number of usable Network ID bits is 21. The number of possible network IDs is 2 raised to 21 or 2,097,152. The number of host IDs per network ID is 2 raised to 8 minus 2, or 254. Source:
Question: What is DNS?

Answer: DNS is Domain Name System. The main function of this network service is to provide host names to TCP/IP address resolution. 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: what is the maximum segment length of a 100Base-FX network?

Answer: The maximum allowable length for a network segment using 100Base-FX is 412 meters. The maximum length for the entire network is 5 kilometers. Source:
Question: What is the responsibilities of Network Layer?

Answer: * Logical addressing
* Best effort delivery Source:
Question: What is DoS?

Answer: DoS, or Denial-of-Service attack, is an attempt to prevent users from being able to access the internet or any other network services. Such attacks may come in different forms and are done by a group of perpetuators. One common method of doing this is to overload the system server so it cannot anymore process legitimate traffic and will be forced to reset. 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:
Question: Briefly describe NAT.

Answer: NAT is Network Address Translation. This is a protocol that provides a way for multiple computers on a common network to share single connection to the Internet. Source:

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