Common Ports Flashcards
1
Q
Characteristics of ports:
A
- Ports allow a single host with a single IP address to run network services.
- Each port number identifies a distinct service
- Each host can have over 65,000 ports per IP address
- Port use is regulated by the Internet Corporation for Assigned Names and Numbers (ICANN)
2
Q
ICANN specifies the following three categories for ports:
A
- Well known ports
- Registered ports
- Dynamic ports
3
Q
Well known Ports
A
- Range from 0 - 1023
* Are assigned to common protocols and services
4
Q
Registered Ports
A
- Range from 1024 to 49151
* Are assigned by ICANN to specific service
5
Q
Dynamic Ports (private or high ports)
A
- Range from 49152 to 65535 and can be used by any service on an ad hoc basis
- Ports are assigned when a session is established and ports are released when the session ends
6
Q
20 TCP and UDP
21 TCP and UDP
A
- File Transfer Protocol (FTP)
7
Q
22 TCP and UDP
A
- Secure Shell (SSH)
8
Q
23 TCP
A
- Telnet
9
Q
25 TCP and UDP
A
- Simple Mail Transfer Protocol (SMTP)
10
Q
53 TCP and UDP
A
Domain Name Server (DNS)
11
Q
67 TCP and UDP
68 TCP and UDP
A
- Dynamic Host Configuration Protocol (DHCP)
12
Q
69 TCP and UDP
A
- Trivial File Transfer Protocol (TFTP)
13
Q
80 TCP and UDP
A
- Hypertext Transfer Protocol (HTTP)
14
Q
110 TCP
A
- Post Office Protocol (POP3)
15
Q
119 TCP
A
- Network News Transport Protocol (NNTP)
