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Category Archives: Computer Networks

Characteristics Used in Connection-oriented communication. It offers error and flow control It is used in Data Link and Transport Layers Stop and Wait ARQ mainly… Read More
In address bar of a browser, have you noticed either http:// or https:// at the time of browsing a website? If neither of these are… Read More
Many folks get confused between these two terms which are associated with the Web. Are they really same? First thing first. HTML is a Language… Read More
Many folks consider that they both are same but are they really same? The Internet is a global network of networks while the Web, also… Read More
Consider a situation when you are not able to access a website and can access other websites. You would want to know if this is… Read More
What is Forwarding? Forwarding is moving incoming packets to appropriate interface. Routers use forwarding table to decide which incoming packet should be forwarded to which… Read More
What are Unicasting, Anycasting, Multicasting and Broadcasting? If the message is sent from a source to a single destination node, it is called Unicasting. This… Read More
Circuit Switching Packet Switching In circuit switching there are 3 phases: i) Connection Establishment. ii) Data Transfer. iii) Connection Released. In Packet switching directly data transfer takes place… Read More
Which of the following is public IP address ? (A) (B) (C) (D) None of the Above Answer: (C) Explanation: Range of… Read More
If subnet mask, which of the following will be Direct Broadcast address ? (A) (B) (C) Both a and b (D) None… Read More
DNS is an application layer protocol. All application layer protocols use one of the two transport layer protocols, UDP and TCP. TCP is reliable and… Read More
  1. Repeater – A repeater operates at the physical layer. Its job is to regenerate the signal over the same network before the signal… Read More
We have introduced IP addressing and classful addressing in the previous post.   Network Address and Mask Network address – It identifies a network on… Read More
IP address is an address having information about how to reach a specific host, especially outside the LAN. An IP address is a 32 bit… Read More
Why IPv4 Datagram Fragmentation required? Different Networks may have different maximum transmission unit (MTU), for example due to differences in LAN technology. When one network… Read More