Admin Table of Contents
Which port is the most common port?
The most common well-known port is 80, which identifies HTTP traffic for a Web server (see port 80). For details about port numbers, see TCP/IP port. The Internet Assigned Numbers Authority (IANA) registers ports 1024 to 49151 for the convenience of the Internet community.
What are the most common open ports?
TCP 80 (Hypertext Transfer Protocol, HTTP) TCP 110 (Post Office Protocol v3, POP3) TCP 119 (Network News Protocol, NNTP) UDP 161 and 162 (Simple Network Management Protocol, SNMP)
What is common port?
Network ports are provided by the TCP or UDP protocols at the Transport layer. They are used by protocols in the upper layers of the OSI model. From 0 to 1023 – well known ports assigned to common protocols and services. From 1024 to 49151 – registered ports assigned by ICANN to a specific service.
How many ports are commonly used?
Between the protocols User Datagram Protocol (UDP) and Transmission Control Protocol (TCP), there are 65,535 ports available for communication between devices. Among this impressive number are three classes of ports: 1. Well-known ports: Range from 0–1,023.
What ports should I know?
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| Port Number | Usage |
|---|---|
| 53 | Domain Name System (DNS) service |
| 80 | Hypertext Transfer Protocol (HTTP) used in World Wide Web |
| 110 | Post Office Protocol (POP3) used by e-mail clients to retrieve e-mail from a server |
| 119 | Network News Transfer Protocol (NNTP) |
What port is 4444?
Service Name and Transport Protocol Port Number Registry
| Service Name | Port Number | Transport Protocol |
|---|---|---|
| krb524 | 4444 | tcp |
| krb524 | 4444 | udp |
| nv-video | 4444 | tcp |
| nv-video | 4444 | udp |
What port is 43?
Well-known ports
| Port | TCP | Description |
|---|---|---|
| 37 | Yes | Time Protocol |
| 42 | Assigned | Host Name Server Protocol |
| 43 | Yes | WHOIS protocol |
| 47 | Reserved |