This blog provides some tables covering common Internet (IP whether TCP or UDP) ports that may be found on CompTIA entry level exams. A continuation of my series addressing content useful for candidates preparing for CompTIA A+ or Security+ exams. Allow me to recap my goal with this series: For instructor-led CompTIA classes, see … Continue reading CompTIA Series – Internet Ports

Jul 03, 2017 · TCP and UDP aren’t the only protocols that work on top of IP. However, they are the most widely used. How TCP Works. TCP is the most commonly used protocol on the Internet. When you request a web page in your browser, your computer sends TCP packets to the web server’s address, asking it to send the web page back to you. Mar 25, 2018 · Network Protocols is a set of rules that guide the computers on how to communicate with other system.TFTP (Trivial File Transfer Protocol), SMTP (Simple Mail Transfer Protocol), TCP (Transmission Control Protocol), UDP (User Datagram Protocol), TCP/IP (Transmission Control Protocol/ Internet Protocol). Apr 13, 2016 · SMTP(Simple Mail Transfer Protocol), etc. Definition Of UDP UDP or User Datagram Protocol is a connectionless protocol found in the transport layer of TCP/IP Model. UDP, which is defined in RFC 768, is the brother of TCP. Like TCP, UDP uses IP as its transport protocol, but the big difference is that UDP does not guaran- tee delivery like TCP does. In a sense, UDP is a “fire and forget” protocol; it assumes that the data sent will reach its destination intact.

SMTP is a connection-oriented, text-based protocol in which a mail sender communicates with a mail receiver by issuing command strings and supplying necessary data over a reliable ordered data stream channel, typically a Transmission Control Protocol (TCP) connection.

The versatility of these TCP and UDP ports available enables you to select the most appropriate one for your task according to your requirement. Following are some of the common TCP and UDP default ports. SMTP - 25. SMTP is known as the Simple Mail Transfer Protocol. It is associated with the TCP port number 25. Solved: Hi there, Please excuse me for this simple question I am confused about extended ACLS when we use (permit|deny) for Protocol IP,TCP,UDP on an access list I have 2 Examples below 1. access-list 102 permit tcp any OR access-list 15. Which of the following protocols can use TCP and UDP, permits authentication and secure polling of network devices, and allows for automated alerts and reports on network devices? A. DNS B. SNMP C. SMTP D. TCP210 Jun 11, 2020 · SMTP stands for Simple Mail Transfer Protocol—put simply, it’s the process by which emails are sent across the Internet. Computer ports are how individual computers connect to a network and complete electronic processes. An SMTP port is a combination of both: a port designed to send email through a network and to its recipient.

15. Which of the following protocols can use TCP and UDP, permits authentication and secure polling of network devices, and allows for automated alerts and reports on network devices? A. DNS B. SNMP C. SMTP D. TCP210

Although many services may rely on a particular TCP or UDP port, only one service or process at a time can listen on that port. When you use RPC with TCP/IP or with UDP/IP as the transport, incoming ports are frequently dynamically assigned to system services as required; TCP/IP and UDP/IP ports that are higher than port 1024 are used. Jul 16, 2020 · Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [ RFC6335 ]. TCP/UDP Port Elenco di tutte le porte TCP e UDP e dei relativi servizi. TCP : Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers: The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as TCP/IP. Apr 10, 2017 · TCP: World Wide Web (Apache TCP port 80), e-mail (SMTP TCP port 25 Postfix MTA), File Transfer Protocol (FTP port 21) and Secure Shell (OpenSSH port 22) etc. UDP : Domain Name System (DNS UDP port 53), streaming media applications such as IPTV or movies, Voice over IP (VoIP), Trivial File Transfer Protocol (TFTP) and online multiplayer games etc.