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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
Hypertext Transfer Protocol HTTP 80	Used to retrieve data from web servers.
Used for secure web pages and sites. Includes encryption services.	HTTP over TLS/SSL HTTPS 443
Used for transferring files between hosts. Contains basic authentication features.	File Transfer Protocol FTP 20 (data) 21 (control)
Used to log into remote systems via a virtual text terminal interface	TELNET 23
Encrypted replacement for Telnet and FTP. Includes Secure Copy Protocol (SCP) and Secure Shell FTP (SFTP)	SECURE SHELL 22
Sends email to and between mail servers.	SMTP 25 Simple Mail Transfer Protocol
Retrieves email from mail servers.	POP3 Post Office Protocol version 3 PORT 110
Retrieves email from mail servers.	IMAP Internet Message Access Protocol PORT 143
Used to share files and resources like printers.	SMB Server Message Block PORT 445
Used to share files on OSX and MacOS networks.	AFP Apple Filing Protocol PORT 548 or 427
Allows computers to find network services without prior configuration. Most commonly used for network printers.	SLP Service Location Protocol PORT 427
Used for network directory services that centrally manage user accounts and network services.	LDAP Lightweight Directory Access Protocol PORT 389, 636 (secure)
Used for remote logins to Windows systems.	RDP Remote Desktop Protocol PORT 3389
Provides name, datagram, and session services for networks using the NetBIOS API. NetBIOS used on TCP/IP networks is sometimes called NetBT. SMB often uses NetBIOS functions as well.	NetBIOS Network Basic Input/Output System PORT 137 - 139
Used to remotely manage and monitor network devices.	SNMP Simple Network Management Protocol PORT 161 - 162
Sends system status messages to a central server for monitoring and review.	Syslog PORT 514
Resolves domain names into IP addresses.	DNS Domain Name System PORT 53
Dynamically assigns IP addresses and other network configuration on joining a network.	DHCP Dynamic Host Configuration Protocol PORT 67 - 68
File Transfer Protocol FTP	TCP 20 / 21