CompTIA A+ Complete Review Guide: CompTIA A+ Common Ports and Protocols Flashcards


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created 2 years ago by James_Walton
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Ports and Protocols
updated 2 years ago by James_Walton
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computers, hardware
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1

548

Apple Filing Protocol (AFP) is a proprietary resource-sharing protocol by Apple, one of several it supports. It uses port 548 for communication. The latest version, 3.4, was introduced with the OS Mountain Lion system.

2

23

Telnet is a protocol that functions at the application layer of the OSI model, providing terminal-emulation capabilities. Telnet runs on port 23 but has lost favor to SSH because Telnet sends data—including passwords—in plain-text format.

3

25

Simple Mail Transfer Protocol (SMTP) is a protocol for sending email between SMTP servers. Clients typically use either IMAP or POP to access their email server and use SMTP to send email. SMTP uses port 25 by default.

4

53

DNS is the Domain Name System, and it is used to t ranslate hostnames into IP addresses. DNS is an example of a protocol that uses both UDP and TCP.

5

80

Hypertext Transfer Protocol (HTTP) is the protocol used for communication between a web server and a web browser. It uses port 80 by default.

6

110

The Post Office Protocol (POP) is a protocol for receiving email from a mail server. It runs on port 110. The current version of the protocol is 3 (POP3), and the alternative to it is Internet Message Access Protocol (IMAP).

7

143

Internet Message Access Protocol (IMAP) is a protocol with a store-and-forward capability. I t can also allow messages to be stored on an email server instead of downloaded to the client . The current version of the protocol is 4 (IMAP4), and the alternative to it is Post Office Protocol (POP). IMAP runs on port 143.

8

443

Hypertext Transfer Protocol over Secure Sockets Layer (HTTPS) is a protocol used to make a secure connection. It uses port 443 by default.

9

3389

Remote Desktop Protocol (RDP) is used in a Windows environment to make remote desktop communications possible.

10

137-139

NetBIOS/NetBT i s an early networking protocol that used a flat namespace, unlike the hierarchal one found in DNS. Computers register their services with the other devices and locate one another using NetBIOS names. It uses ports 137–139.

11

445

Server Message Block (SMB) is an application layer protocol used to provide shared access to resources. The Common Internet File System (CIFS) protocol is a dialect of SMB. It is primarily used in Windows systems. The latest version is 3.1.1, which was released to support Windows 10 and Windows Server 2016. It operates as a client-server application. It uses port 445.

12

427

Service Location Protocol (SLP) is a service discovery protocol that allows computers and other devices to find services in a local area network. It has been defined in RFC 2608 and RFC 3224 as standards-track documents. All devices are required to listen on port 427 for UDP packets.

13

548

Apple Filing Protocol (AFP) is a proprietary resource-sharing protocol by Apple, one of several it supports. It uses port 548 for communication. The latest version, 3.4, was introduced with the OS Mountain Lion system.

14

67/68

Dynamic Host Configuration Protocol (DHCP) serves a useful purpose of issuing IP addresses and other network-related configuration values to clients to allow them to operate on the network. It uses ports 67 and 68.

15

389

Lightweight Directory Access Protocol (LDAP) is a protocol that provides a mechanism to access and query directory services systems. These systems are most likely to be Microsoft’s Active Directory but could also be Novell Directory Services (NDS). Although LDAP supports command-line queries executed directly against the directory database, most LDAP interactions are via utilities such as an authentication program (network logon) or a search engine that locates a resource in the directory. LDAP uses port 389.

16

161/162

Simple Network Management Protocol (SNMP) is a protocol that facilitates network management functionality. It is not, in itself, a network management system (NMS); it is simply the protocol that makes NMS possible. It uses ports 161 and 162.

17

21

File Transfer Protocol is both a TCP/IP protocol and software that permits the transferring of files between computer systems. Because FTP has been implemented on numerous types of computer systems, files can be transferred between disparate systems (for example, a personal computer and a minicomputer). It uses ports 20 and 21 by default. It can be configured to allow or deny access to specific IP addresses and can be configured to work with exceptions.