CCNA - SRWE&ENSA - Cap9-12

A technician is configuring the channel on a wireless router to either 1, 6, or 11. What is the purpose of adjusting the channel?

• to disable broadcasting of the SSID

• to enable different 802.11 standards

• to provide stronger security modes

• to avoid interference from nearby wireless devices

Which two commands can be used to enable BPDU guard on a switch? (Choose two.)

• S1(config)# spanning-tree bpduguard default

• S1(config-if)# spanning-tree bpduguard enable

• S1(config-if)# enable spanning-tree bpduguard

• S1(config-if)# spanning-tree portfast bpduguard

• S1(config)# spanning-tree portfast bpduguard default

Refer to the exhibit. The Fa0/2 interface on switch S1 has been configured with the switchport port-security mac-address 0023.189d.6456 command and a workstation has been connected. What could be the reason that the Fa0/2 interface is shutdown?

• The connection between S1 and PC1 is via a crossover cable.

• The Fa0/24 interface of S1 is configured with the same MAC address as the Fa0/2 interface.

• S1 has been configured with a switchport port-security aging command.

• The MAC address of PC1 that connects to the Fa0/2 interface is not the configured MAC address.

A network administrator is configuring DAI on a switch with the command ip arp inspection validate src-mac . What is the purpose of this configuration command?

• It checks the source MAC address in the Ethernet header against the MAC address table.

• It checks the source MAC address in the Ethernet header against the user-configured ARP ACLs.

• It checks the source MAC address in the Ethernet header against the target MAC address in the ARP body.

• It checks the source MAC address in the Ethernet header against the sender MAC address in the ARP body.

Refer to the exhibit. A network engineer is troubleshooting host connectivity on a LAN that uses a first hop redundancy protocol. Which IPv4 gateway address should be configured on the host?

• 192.168.2.0

• 192.168.2.1

• 192.168.2.2

• 192.168.2.100

A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement describes a feature that is associated with HSRP?

• HSRP uses active and standby routers.

• It uses ICMP messages in order to assign the default gateway to hosts.

• It allows load balancing between a group of redundant routers.

• HSRP is nonproprietary.

Refer to the exhibit. Which destination MAC address is used when frames are sent from the workstation to the default gateway?

• MAC address of the forwarding router

• MAC addresses of both the forwarding and standby routers

• MAC address of the standby router

• MAC address of the virtual router

What are two protocols that are used by AAA to authenticate users against a central database of usernames and password? (Choose two.)

• NTP

• TACACS+

• SSH

• HTTPS

• RADIUS

What represents a best practice concerning discovery protocols such as CDP and LLDP on network devices?

• Use the open standard LLDP rather than CDP.

• Disable both protocols on all interfaces where they are not required.

• Use the default router settings for CDP and LLDP.

• Enable CDP on edge devices, and enable LLDP on interior devices.

Which protocol should be used to mitigate the vulnerability of using Telnet to remotely manage network devices?

• SCP

• SSH

• TFTP

• SNMP