WorksheetsCCNA - SRWE&ENSA - Cap9-12
Total questions: 15
Worksheet time: 14mins
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
Which feature on a switch makes it vulnerable to VLAN hopping attacks?
the mixed duplex mode enabled for all ports by default
the limited size of content-addressable memory space
mixed port bandwidth support enabled for all ports by default
the automatic trunking port feature enabled for all ports by default
What are the two methods that are used by a wireless NIC to discover an AP? (Choose two.)
sending an ARP request
delivering a broadcast frame
transmitting a probe request
initiating a three-way handshake
receiving a broadcast beacon frame
Which wireless network topology would be used by network engineers to provide a wireless network for an entire college building?
ad hoc
hotspot
infrastructure
mixed mode
A company has recently implemented an 802.11n wireless network. Some users are complaining that the wireless network is too slow. Which solution is the best method to enhance the performance of the wireless network?
Replace the wireless NICs on the computers that are experiencing slow connections.
Split the traffic between the 2.4 GHz and 5 GHz frequency bands.
Disable DHCP on the access point and assign static addresses to the wireless clients.
Upgrade the firmware on the wireless access point.
A network administrator is configuring port security on a Cisco switch. The company security policy specifies that when a violation occurs, packets with unknown source addresses should be dropped and no notification should be sent. Which violation mode should be configured on the interfaces?
off
restrict
protect
shutdown
