Common Ports Flashcards
To learn common ports used by most servers (36 cards)
1
Q
Telnet (unencrypted)
A
tcp/23
2
Q
SSH
A
tcp/22
3
Q
DNS
A
udp/53
4
Q
SMTP
A
tcp/25
5
Q
IMAP4
A
tcp/143
6
Q
POP3
A
tcp/110
7
Q
FTP
A
tcp/20 and 21
8
Q
TFTP
A
udp/69
9
Q
SFTP
A
tcp/22
10
Q
DHCP
A
udp/67 and 68
11
Q
HTTP
A
tcp/80
12
Q
HTTPS
A
tcp/443
13
Q
SNMP
A
udp/161
14
Q
RDP
A
tcp/3389
15
Q
NTP
A
udp/123
16
Q
SIP
A
tcp/5060 and 5061
17
Q
H.323
A
tcp/1720
18
Q
SMB
A
tcp/445
19
Q
LDAP
A
tcp/389
20
Q
LDAPS
A
tcp/636
21
Q
ICANN
A
Internet Corporation for Assigned Names and Numbers
22
Q
ARIN
A
American Registry for Internet Numbers
23
Q
IANA
A
Internet Assigned Numbers Authority
24
Q
Class A Subnet
A
1 - 126 : 255.0.0.0 /8
25
Class B Subnet
128 - 191 : 255.255.0.0 /16
26
Class C Subnet
192-223 : 255.255.255.0 /24
27
NAT
Network Address Translation
28
Class A Private Range
10. 0.0.0 - 10.255.255.255
| 255. 0.0.0
29
Class B Private Range
172. 16.0.0 - 172.31.255.255
| 255. 255.0.0
30
Class B Non-Routable Private Range
169. 254.0.0 - 169.254.255.255
| 255. 255.0.0
31
Class C Private Range
192. 168.0.0 - 192.168.255.255
| 255. 255.255.0
32
APIPA
Automatic Private IP Addressing
| Non-routable addressing assigned to a host that did not have an IP address manually or dynamically assigned
33
Unicast
One-to-one communication flow
34
Broadcast
One-to-all communication flow
35
Multicast
One-to-many communication flow
36
Multicast group
Creates an IP address in the class D range
