Networking concepts
Networking concepts
1. What are the two types of transmission technology available?
(i) Broadcast and (ii) point-to-point
2. What is subnet?
A generic term for section of a large networks usually separated by a bridge or router.
3. Difference between the communication and transmission.
Transmission is a physical movement of information and concern issues like bit polarity, synchronisation, clock etc.
Communication means the meaning full […]
Explain 7 layers of OSI model ? What are the benifits of OSI model ? Does every networking device need to have all the layers ?
Explain 7 layers of OSI Reference model
This is the first questions that will be asked by CISCO and any other networking related Company. Infact this question was asked to me by 6 companies CISCO,Adobe,Infosys, Wipro,Motorola and IBM. How you explain OSI model determines how much you know about it so always use big terms and […]
Explain TCP/IP model. What is the difference between OSI and TCP model
This is another CICCO favourite questions for Computer Freshers.
As compared to OSI model, TCP model has only 5 layers. Please Note that The original TCP/IP reference model consisted of four layers, but has evolved into a five-layer model now.
The current 5 layers are -
5. Application layer
4. Transport layer
3. Network layer
2. Data link layer
1. Physical layer
In […]
What is IPv6 ? How it is different from IPv4 ? How many bits does an IPv6 adderss has ?
What is IPv6 ?
Internet Protocol version 6 (IPv6) is a network layer protocol for packet-switched internetworks. It is designated as the successor of IPv4, the current version of the Internet Protocol.
How it is different from IPv4 ?
Here are some of the points which makes it different than IPv4. The first one is a MUST. If […]
What are the various Channel Control Protocols ? What is Aloha and Slotted Aloha ? What is CSMA/CD ?
The Aloha protocol(developed in Hawaii) is an OSI layer 2 protocol for LAN networks with broadcast topology.
The first version of the protocol was basic:
* If you have data to send, send the data
* If the message collides with another transmission, try resending later
Pure Aloha had a maximum […]
What is ARP and RARP ? What is the Difference between them ?
In computer networking, the Address Resolution Protocol (ARP) is the method for finding a host’s hardware address when only its network layer address is known. Due to the overwhelming prevalence of IPv4 and Ethernet, ARP is primarily used to translate IP addresses to Ethernet MAC addresses. It is also used for IP over other LAN […]
Read the rest of this entry »Explain Sliding Window
The TCP receive window size is the amount of received data (in bytes) that can be buffered during a connection. The sending host can send only that amount of data before it must wait for an acknowledgment and window update from the receiving host. Sliding Window is when the size of the window changes in […]
Read the rest of this entry »What is Routing ? What is Adaptive and Hierarchical Routing ?
Routing means selecting paths in a computer network along which to send data.
Routing directs forwarding, the passing of logically addressed packets from their source network, toward their ultimate destination through intermediary nodes; typically hardware devices called routers. The routing process usually directs forwarding on the basis of routing tables which maintain a record of the […]
What are the sizes of packet sizes and headers of various protocols ?
I Haven’t heard any company asking this question but still its better to know a thing or two about them. Here is a Good Advice - Even if you don’t know the header size of what the interviewer is asking, tell the size of thsoe headers which youi know. This will make him feel that […]
Read the rest of this entry »What is IGP (Interior Gateway Protocol) ?
It is any routing protocol used within an autonomous system.
Read the rest of this entry »-
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