Computer Network – geeksforjobs

 

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Network :

A network is defined as a group of computers and other devices connected in some way to be able to exchange data. Each device in the network will be thought to have a unique address of each node. Addresses are numerical quantities that are easy to work with computers, but not for humans to remember. ex: 204.160.241.98. Some networks also provide names that humans can remember more easily than numbers. Ex: Javasoft.com corresponds to the above numeric address.

Addressing

Internet Address:

Consists of 4 bytes separated by periods. ex: 136.102.233.49

Inter NIC Register:

It is the organization in which it allocates address ranges that correspond to the network.

CRITERIA CONSIDERED:

  1. geographic region
  2. Organization, enterprise
  3. The department
  4. The host

Domain Name System :

DNS servers are responsible for translating mnemonic textual Internet addresses into hard numeric Internet addresses.

Portal:

  • HTTP 80
  • FTP 20 and 21
  • STMP 25
  • POP3 110
  • TELNET 23
  • FINGER 79
  • GOPHER 70

Applications and potential nominees are reviewed.

Topology Type:

  1. Bus topology
  2. Star topology
  3. Ring topology
  4. Mesh topology
  5. Tree topology
  6. Hybrid topology

Types of network:

  1. LAN (Local Area Network)
  2. MAN (Metropolitan Area Network)
  3. WAN (Wide Area Network)

PROTOCOLS:

It defines the rules that govern communication between two computers connected to a network.

Rolls:

  1. Addressing
  2. Routing messages
  3. Recovery detection error
  4. The sequence
  5. flow control

Protocol layer

  1. application layer
  2. Presentation part
  3. Session layer
  4. transport layer
  5. network layer
  6. Information chain floor
  7. physical layer


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