Free Trial

Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.

  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 2

Chapter 2

Table 2-1. Application Layer Protocols/Applications
ProtocolDescriptionTCP PortUDP Port
FTPFile Transfer Protocol: Transfers files with a remote host (typically requires authentication of user credentials)20 and 21 
SSHSecure Shell: Securely connect to a remote host (typically via a terminal emulator)22 
SFTPSecure FTP: Provides FTP file-transfer service over a SSH connection22 
SCPSecure Copy: Provides a secure file-transfer service over a SSH connection and offers a file’s original date and time information, which is not available with FTP22 
TelnetTelnet: Used to connect to a remote host (typically via a terminal emulator)23 
SMTPSimple Mail Transfer Protocol: Used for sending e-mail25 
DNSDomain Name System: Resolves domain names to corresponding IP addresses5353
TFTPTrivial File Transfer Protocol: Transfers files with a remote host (does not require authentication of user credentials) 69
DHCPDynamic 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 67
HTTPHypertext Transfer Protocol: Retrieves content from a web server80 
POP3Post Office Protocol version 3: Retrieves e-mail from an e-mail server110 
NNTPNetwork News Transport Protocol: Supports the posting and reading of articles on Usenet news servers119 
NTPNetwork Time Protocol: Used by a network device to synchronize its clock with a time server (NTP server) 123
SNTPSimple 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 123
IMAP4Internet Message Access Protocol version 4: Retrieves e-mail from an e-mail server143 
LDAPLightweight Directory Access Protocol: Provides directory services (for example, a user directory (including username, password, e-mail, and phone number information) to network clients389 
HTTPSHypertext Transfer Protocol Secure: Used to securely retrieve content from a web server443 
rshRemote Shell: Allows commands to be executed on a computer from a remote user514 
RTSPReal Time Streaming Protocol: Communicates with a media server (for example, a video server) and controls the playback of the server’s media files554554
RDPRemote Desktop Protocol: A Microsoft protocol that allows a user to view and control the desktop of a remote computer3389 



  

You are currently reading a PREVIEW of this book.

                                                                                                                    

Get instant access to over $1 million worth of books and videos.

  

Start a Free 10-Day Trial


  
  • Safari Books Online
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint