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Ports

QuestionAnswer
What port should be open in order for users to identify websites by domain name? UDP 53
What has a default port of 22? SSH (Secure Shell)
A security administrator wants to secure remote telnet services and decides to use services over SSH. What port should be allowed on the firewall by default? Port 22
Which port would be blocked if a security administrator wants to deny access to websites? Port 80
What two protocols does HTTP/S use for connection security, and what TCP port does it operate on by default? HTTP/S uses SSL (Secure Sockets Layer) or TLS (Transport Layer Security) and port 443.
What is the IEEE standard for port-based access control? 802.1X
What is the port number for Simple Mail Transport Protocol (SMTP)? 25
What is the port number for Trivial File Transfer Protocol (TFTP)? 69
What is the port number for Post Office Protocol 3 (POP3)? 110
What are the port numbers for FTP? 20 and 21
What is the port number for Telnet? 23
What port does PPTP use? TCP 1723
What port does L2TP use? UDP 1701
What port would be blocked if a security administrator wants to disable FTP? Port 21
A security administrator needs to Telnet into a router to change some configurations. What port would need to be open to allow them to change the configurations? Port 23
You are configuring a network firewall to allow SMTP outbound email traffic, and PO3 inbound email traffic. What TCP/IP ports should you open on the firewall? 2 answers 25 and 110
What port is used by SNMP? 161
You want to close all ports associated with NetBIOS on your network firewalls to prevent attacks directed against NetBIOS. What ports should you close? 135, 137-139
What protocol uses port 443? HTTPS
What ports does FTP use to establish sessions and manage traffic? 20,21
Your network uses an FTP server for file transfers. You want to secure logon credentials used with FTP so they are not passed in cleartext. What should you do? Add SSL to port 21. 21 is for logon/control info and 20 is for transfer.
What port is used by SNMP? 161
What protocol uses port 636 and 389? LDAP
What protocol uses port 88? Kerberos
What port(s) are used with TACACS? port 49
Created by: Ldc001