Ports Flashcards
1
Q
port 20
A
FTP Data
data transfer between nodes
TCP
2
Q
port 21
A
FTP Control
FTP commands
TCP
3
Q
port 22
A
SSH, SFTP, SCP
encrypted Telnet
TCP
4
Q
port 23
A
Telnet
run commands on remote device (plaintext)
TCP
5
Q
port 25
A
SMTP
outgoing email
TCP
6
Q
port 49
A
TACAS+ Cisco Proprietary
remotely authenticate into network device (AAA)
TCP
7
Q
port 53
A
DNS
resolve FQDN to IP
TCP for zone transfers
UDP name queries
8
Q
ports 67 & 68
A
DHCP
dynamically assigns IP addresses to nodes
UDP
9
Q
port 69
A
TFTP
small file transfers. router and switch configs
UDP
10
Q
port 80
A
HTTP
transfer web content
TCP
11
Q
port 88
A
Kerberos
network authentication
TCP & UDP
12
Q
port 110
A
POP3
retrieving email (take mail off server) TCP
13
Q
port 123
A
NTS
network time protocol
UDP
14
Q
port 135
A
MS RPC
remote procedure call
TCP & UDP
15
Q
port 137
A
NetBios Name Service
TCP & UDP
