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Network+ well-known ports
CompTIA 2017 well-known ports. If TCP/UDP isn't specified, assume both.
29
Computer Networking
Intermediate
01/24/2017
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Term
SCP
 Definition
TCP 22 (same as SSH)
Term
TACACS+
 Definition
49
Term
IMAP
 Definition
143
Term
BGP
 Definition
179
Term
LDAP
 Definition
389
Term
MS active domain sharing and file sharing
 Definition
TCP 445
Term
FTP
 Definition
TCP 20-21
Term
SSH
 Definition
TCP 22
Term
telnet
 Definition
TCP 23
Term
DNS
 Definition
53
Term
SMTP
 Definition
TCP 25
Term
POP3
 Definition
TCP 110
Term
DHCP
 Definition
67-68
Term
HTTPS
 Definition
TCP 443
Term
TFTP
 Definition
UDP 69
Term
SYSLOG
 Definition
UDP 514
(Reliable syslog service TCP 601)
Term
DHCPv6
 Definition
546-547
Term
H.323
 Definition
TCP 1720
Term
RADIUS
 Definition
1812-1813
Term
MGCP
 Definition
2427 and 2727
Term
RTP
 Definition
TCP 5004-5005
Term
SIP
 Definition
TCP 5060-5061
Term
SNMP
 Definition
managed devices listen on UDP 161 (10161 w/TLS)
NMS listen on UDP 162 (10162 w/TLS)
Term
Kerberos
 Definition
88
464 for change/set password
749-752 for admin/server management
Term
NTP
 Definition
123
Term
NNTP
 Definition
119
Term
NetBIOS
 Definition
137 name service for resolution
138 datagram service
139 session service
Term
RDP
 Definition
TCP 3389
Term
SFTP
 Definition
22 (same as SSH)
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