Cisco CCNA Interconnecting Cisco Networking Devices 1 (ICND1)

1.

An administrator has connected devices to a switch and, for security reasons, wants the dynamically learned MAC addresses from the address table added to the
running configuration. What must be done to accomplish this?

Enable port security and use the keyword sticky. Set the switchport mode to trunk and save the running configuration. Use the switchport protected command to have the MAC addresses added to the configuration. Use the no switchport port-security command to allow MAC addresses to be added to the configuration.

2.

Why would a network administrator configure port security on a switch?

to prevent unauthorized Telnet access to a switch port to prevent unauthorized hosts from accessing the LAN to limit the number of Layer 2 broadcasts on a particular switch port block unauthorized access to the switch management interfaces

3.

How can you ensure that only the MAC address of a server is allowed by switch port Fa0/1?

Configure port Fa0/1 to accept connections only from the static IP address of the server. Configure the server MAC address as a static entry of port security. Use a proprietary connector type on Fa0/1 that is incomputable with other host connectors. Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address.

4.

What should be part of a comprehensive network security plan?

Allow users to develop their own approach to network security. Physically secure network equipment from potential access by unauthorized individuals. Encourage users to use personal information in their passwords to minimize the likelihood of passwords being forgotten. Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported. Minimize network overhead by deactivating automatic antivirus client updates.

5.

What is the purpose of the switchport command?

Switch(config-if)# switchport port-security maximum 1
Switch(config-if)# switchport port-security mac-address 0018.DE8B.4BF8

It ensures that only the device with the MAC address 0018.DE8B.4BF8 will be able to connect to the port that is being configured. It informs the switch that traffic destined for MAC address 0018.DE8B.4BF8 should only be sent to the port that is being configured. It will act like an access list and the port will filter packets that have a source or destination MAC of 0018.DE8B.4BF8. The switch will shut down the port of any traffic with source MAC address of 0018.DE8B.4BF8.

6.

From which of the following attacks can Message Authentication Code (MAC) shield your network?

DoS DDoS spoofing SYN floods

7.

If a host experiences intermittent issues that relate to congestion within a network while remaining connected, what could cause congestion on this LAN?

half-duplex operation broadcast storms network segmentation multicasting

8.

Which of the following is true regarding the configuration of SwitchA?

only 5 simultaneous remote connections are possible remote connections using ssh will require a username and password only connections from the local network will be possible console access to SwitchA requires a password

9.

What is the subnet broadcast address of the LAN connected to Router1?

192.168.136.15 192.168.136.31 192.168.136.63 192.168.136.127

10.

What is the bandwidth on the WAN interface of Router 1?

16 Kbit/sec 32 Kbit/sec 64 Kbit/sec 128 Kbit/sec 512 Kbit/sec

Cisco CCNA Interconnecting Cisco Networking Devices 1 (ICND1)

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