Explain the process of packet filtering by TCP or UDP port number.
What will be an ideal response?
Filtering by TCP or UDP port number is commonly called port filtering or protocol filtering. Using TCP or UDP port numbers can help you filter a wide variety of information, including SMTP and POP e-mail messages, NetBIOS sessions, DNS requests, and Network News Transfer Protocol (NNTP) newsgroup sessions. For instance, you can block everything but TCP Port 80 for Web, TCP Port 25 for e-mail, and TCP Port 21 for FTP.
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One way to protect against DoS attacks is to configure the firewall to block ICMP packets from the outside of the network
Indicate whether the statement is true or false.
Each interface on a router must have an IP address and what else to be able to communicate on the network?
A. network ID B. default gateway C. MAC address D. serial number