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Network port number

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vajedotu's version from 2016-09-21 19:50

Protocols vs Ports

Question Answer
FTP TCP 20, 21
SSHTCP 22
TELNETTCP 23
SMTPTCP 25
DNSTCP, UDP 53
DHCPUDP 67, 68
TFTPUDP 69
HTTPTCP, UDP 80
POP3TCP 110
NTPUDP 123
NetBIOSTCP, UDP 137, 138, 139
IMAPTCP, UDP 143
SNMPTCP/UDP 161, 162
LDAPTCP, UDP 389
HTTPSTCP 443
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Protocol vs Layers

Question Answer
Layer3EIGRP
Layer3ICMP
Layer3IPv4
Layer3IPv6
Layer3IPSec
Layer3OSPF
Layer3RIP
Layer2FDDI
Layer2FRAME RELAY
Layer2DTP
Layer2HDLC
Layer2802.11
Layer2LLDP
Layer2PPP
Layer2STP
Layer2VTP
Layer2VLAN
Layer2ARP
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Administrative Distances

Question Answer
Connected Interfaces0
Static Routes1
Enhanced Interior Gateway Routing Protocol (EIGRP) Summary Routes5
External Border Gateway Protocol (eBGP) Routes20
Internal EIGRP Routes90
IGRP Routes100
OSPF Routes110
Intermediate System-to-Intermediate System (IS-IS)115
Routing Information Protocol (RIP) Routes120
Exterior Gateway Protocol (EGP) Routes140
On Demand Routing (ODR)160
External EIGRP Routes170
Internal Border Gateway Protocol (iBGP) Routes200
Unreachable or Unknown Routes255
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Router Logging Categories

Question Answer
emergencies0
alerts1
critical2
errors3
warnings4
notifications5
informational6
debugging7
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