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You work as a Network Administrator for Net Perfect Inc. The company has a small TCP/IP-based network environment. The network contains a Cisco Catalyst 6000 family switch. A few sales people come to your outer office and use your local network to access the Internet, as well as to demonstrate their products. What will you do to prevent your network from being accessed by any outside computers?
According to the question, you are required to prevent outside computers from accessing your network. You should therefore configure the
switch's port access based on the MAC address, which can be done by configuring port security. Port security is a feature of Cisco Catalyst
series switches. Port security is used to block input based on the media access control (MAC) address to an Ethernet, Fast Ethernet, or Gigabit
Ethernet port. It denies the port access to a workstation when the MAC address of the station attempting to access the port is different from
any of the MAC addresses specified for that port.
Answer B and C are incorrect. A firewall is used to protect an internal network or intranet against unauthorized access from the
Internet or other outside networks.
Answer D is incorrect. A port scanner is a software tool that is designed to search a network host for open ports. This tool is often used
by administrators to check the security of their networks. It is also used by hackers to compromise the network and systems.