As you know, in the Network+ exam (N10-007), you will need to demonstrate your knowledge of important protocols at use in the network. You should also be aware of the Transport layer protocols in use by these network services, as well as the specific port number used. This handle table will help you. And check out this blog for great practice questions in this area. Be sure to click the READ MORE link – this list does not end with IMAP 🙂

• DHCP
  Dynamic Host Configuration Protocol: Dynamically assigns IP address information (for example, IP address, subnet mask, DNS server’s IP address, and default gateway’s IP address) to a network device
  UDP 67, 68
• DNS
  Domain Name System: Resolves domain names to corresponding IP addresses
  TCP 53
  UDP 53
• FTP
  File Transfer Protocol: Transfers files with a remote host (typically requires authentication of user credentials)
  TCP 20 and 21
• H.323
  A signaling protocol that provides multimedia communications over a network
  TCP 1720
• HTTP
  Hypertext Transfer Protocol: Retrieves content from a web server
  TCP 80
• HTTPS
  Hypertext Transfer Protocol Secure: Used to securely retrieve content from a web server
  TCP 443
• IMAP
  Internet Message Access Protocol: Retrieves email from an email server
  TCP 143

• IMAP4
  Internet Message Access Protocol Version 4: Retrieves email from an email server
  TCP 143
• LDAP
  Lightweight Directory Access Protocol: Provides directory services (for example, a user directory that includes username, password, email, and phone number information) to network clients
  TCP 389
• LDAPS
  Lightweight Directory Access Protocol over SSH: A secured version of LDAP
  TCP 636
• MGCP
  Media Gateway Control Protocol: Used as a call control and communication protocol for Voice over IP networks
  UDP 2427, 2727
• NetBIOS
  Network Basic Input/Output System: Provides network communication services for LANs that use NetBIOS
  TCP 139
  UDP 137, 138
• NNTP
  Network News Transport Protocol: Supports the posting and reading of articles on Usenet news servers
  TCP 119
• NTP
  Network Time Protocol: Used by a network device to synchronize its clock with a time server (NTP server)
  UDP 123
• POP3
  Post Office Protocol Version 3: Retrieves email from an email server
  TCP 110
• RDP
  Remote Desktop Protocol: A Microsoft protocol that allows a user to view and control the desktop of a remote computer
  TCP 3389
• rsh
  Remote Shell: Allows commands to be executed on a computer from a remote user
  TCP 514
• RTP
  Real-time Transport Protocol: Used for delivering media-based data (such as Voice over IP) through the network
  TCP 5004, 5005
  UDP 5004, 5005
• RTSP
  Real-Time Streaming Protocol: Communicates with a media server (for example, a video server) and controls the playback of the server’s media files
  TCP 554
  UDP 554
• SCP
  Secure Copy: Provides a secure file-transfer service over an SSH connection and offers a file’s original date and time information, which is not available with FTP
  TCP 22
• SFTP
  Secure FTP: Provides FTP file-transfer service over an SSH connection
  TCP 22
• SIP
  Session Initiation Protocol: Used to create and end sessions for one or more media connections, including Voice over IP calls
  TCP 5061
  UDP 5060
• SMB
  Server Message Block: Used to share files, printers, and other network resources
  TCP 445
• SMTP
  Simple Mail Transfer Protocol: Used for sending email
  TCP 25
• SNMP
  Simple Network Management Protocol: Used to monitor and manage network devices
  UDP 161
• SNMP Trap
  Simple Network Management Protocol Trap: A notification sent from an SNMP agent to an SNMP manager
  TCP 162
  UDP 162
• SNTP
  Simple Network Time Protocol: Supports time synchronization among network devices, similar to Network Time Protocol (NTP), although SNTP uses a less complex algorithm in its calculation and is slightly less accurate than NTP
  UDP 123
• SSH
  Secure Shell: Used to securely connect to a remote host (typically via a terminal emulator)
  TCP 22
• Telnet
  Telnet: Used to connect to a remote host (typically via a terminal emulator)
  TCP 23
• TFTP
  Trivial File Transfer Protocol: Transfers files with a remote host (does not require authentication of user credentials)
  UDP 69