Port Numbers In Computer Networks
Port Numbers In Computer Networks
Click here to other Kerala PSC Study notes.
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
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...
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...
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...
Click here to Search
Secretariat Assistant Syllabus 2021
LDC Syllabus 2022
Tenth Level Mains Syllabus
Secretariat Assistant Previous Question paper
Secretariat Assistant Syllabus 2021
10th level Preliminary Exam Previous Year Question Paper
LDC Previous Question papers
LGS Previous Question papers
Village Field Assistant Previous Question papers
Preliminary Exam Answer key 2021
Fireman Previous year Question Papers
UPSA Previous Question papers
LPSA Previous Question papers
PSC Questions and Answers
Kerala PSC Exam Calendar