Port Numbers In Computer Networks Port Numbers In Computer Networks

Port Numbers In Computer NetworksPort Numbers In Computer Networks

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A port is an endpoint of communication in an operating system. While the term is also used for female connectors on hardware devices, in software it is a logical construct that identifies a specific process or a type of network service.

When referring to a network or to the Internet, a software or network port is a location where information is sent. For example, port 80 is the HTTP network port. A listing of commonly known and used ports can also be found on the below listing.

  • 18 – MSP (Message Send Protocol)
  • 20 - FTP (File Transfer Protocol) for data transfer
  • 21 – FTP (File Transfer Protocol) for data control
  • 23 – Telnet
  • 22 – SSH - Remote Login Protocol
  • 25 - SMTP (Simple Mail Transfer Protocol) for is used for sending mails.
  • 53 – DNS (Domain Name System)
  • 67 – DHCP (Dynamic Host Configuration Protocol) for sending data to the server – Bootps
  • 68 – DHCP (Dynamic Host Configuration Protocol) for data to the client - Bootpc
  • 80 – HTTP (Hypertext Transfer Protocol)
  • 109 – POP2
  • 110 - POP3 (Post Office Protocol) used for receiving mails but it uses log-in process.
  • 119 – NNTP (Network News Transfer Protocol)
  • 137 – NetBIOS Name Service
  • 139 – NetBIOS Datagram Service
  • 143 – IMAP4 (Interim Mail Access Protocol) used for receiving mails.
  • 150 – NetBIOS Session Service
  • 161 – SNMP
  • 179 – BGP (Border Gateway Protocol)
  • 389 – LDAP (Lightweight Directory Access Protocol)
  • 443 – HTTPS (HTTP-secure)
  • 546 – DHCP Client
  • 547 – DHCP Server
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A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. In a total eclipse, the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured. A lunar eclipse occurs when the Moon moves into the Earth's shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned , with Earth between the other two. A lunar eclipse can occur only on the night of a full moon.

സൂര്യഗ്രഹണം സംഭവിക്കുന്നത്, ഭൂമിയുടെ ഒരു ഭാഗം ചന്ദ്രൻ എറിഞ്ഞ നിഴലിൽ മുഴുകുമ്പോൾ സൂര്യപ്രകാശത്തെ പൂർണ്ണമായോ ഭാഗികമായോ തടയുന്നു. സൂര്യനും ചന്ദ്ര...


Rajya Sabha nomination kerala


രാജ്യസഭയിലേക്ക് നോമിനേറ്റ് ചെയ്യപ്പെട്ട മലയാളികള്‍.

Code:പണിയില്‍ രാമന്‍ ശങ്കരനാണ്. എന്നാല്‍ അബു രംഗത്തു ഗോപിയാണ് .

പണിയില്‍ -സര്‍ദാര്‍ K.M.പണിക്കര്‍(1959).
രാമന്‍ -Dr.G. രാമചന്ദ്രന്‍(1964).
ശങ്കരനാണ് -G.ശങ്കരകുറുപ്പ്(1968).
അബു -അബു എബ്രഹാം(1972).
രംഗത്ത് -കസ്തൂരിരംഗന്‍(2003).
ഗോപി -സുരേഷ്ഗോപി(2016).

രാജ്യസഭയില്‍ നോമിനേറ്റ് ചെയ്യപ്പെട്ട മലയാ...


Pulitzer Prize Winners 2017


Journalism .

Breaking news : Staff of the East Bay Times, for their coverage of the Ghost Ship fire.

Breaking news photography : Daniel Berehulak, freelancer, for his photography of government assault on drug dealers and users in the Philippines.

Commentary : Peggy Noonan of the Wall Street Journal, for her coverage of the election season.

Criticism : Hilton Als of the New Yorker, for his theater reviews.

Editorial cartooning : Jim Morin of the Miami Herald, for his political cartoons.

Editorial writing : Art Cullen of the Storm Lake Times, for his coverage of Iowa’s corporate agricultural interests.

Explanatory reporting : International Consortium of Investigative Journalists, McClatchy and Miami Herald, for the Panama Papers.

Feature photography : E. Jason Wambsgans of the Chicago Tribune, for his photo essay on a child who survive...