CCNA v7.0 81-100

81. Refer to the exhibit. After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem?

• There is no address on Fa0/0 to use as a default gateway.

• RTA is using the same subnet for VLAN 20 and VLAN 30.

• Dot1q does not support subinterfaces.

• The no shutdown command should have been issued on Fa0/0.20 and Fa0/0.30.

82. Which three pairs of trunking modes will establish a functional trunk link between two Cisco switches? (Choose three.)

• dynamic auto - dynamic auto

• access - trunk

  access - dynamic auto

• dynamic desirable - trunk

  dynamic desirable - dynamic auto

• dynamic desirable - dynamic desirable

83. A technician is configuring a router for a small company with multiple WLANs and doesn’t need the complexity of a dynamic routing protocol. What should be done or checked?

• Verify that there is not a default route in any of the edge router routing tables.

• Create static routes to all internal networks and a default route to the internet.

• Create extra static routes to the same location with an AD of 1.

• Check the statistics on the default route for oversaturation.

84. A company is deploying a wireless network in the distribution facility in a Boston suburb. The warehouse is quite large and it requires multiple access points to be used. Because some of the company devices still operate at 2.4GHz, the network administrator decides to deploy the 802.11g standard. Which channel assignments on the multiple access points will make sure that the wireless channels are not overlapping?

• channels 1, 5, and 9

• channels 1, 6, and 11

• channels 1, 7, and 13

• channels 2, 6, and 10

85. A network administrator of a small advertising company is configuring WLAN security by using the WPA2 PSK method. Which credential do office users need in order to connect their laptops to the WLAN?

• the company username and password through Active Directory service

• a key that matches the key on the AP

• a user passphrase

• a username and password configured on the AP

86. Refer to the exhibit. What are the possible port roles for ports A, B, C, and D in this RSTP-enabled network?

• alternate, designated, root, root

• designated, alternate, root, root

• alternate, root, designated, root

• designated, root, alternate, root

87. Refer to the exhibit. Which static route would an IT technician enter to create a backup route to the 172.16.1.0 network that is only used if the primary RIP learned route fails?

• ip route 172.16.1.0 255.255.255.0 s0/0/0

• ip route 172.16.1.0 255.255.255.0 s0/0/0 121

• ip route 172.16.1.0 255.255.255.0 s0/0/0 111

• ip route 172.16.1.0 255.255.255.0 s0/0/0 91

88. What mitigation plan is best for thwarting a DoS attack that is creating a MAC address table overflow?

• Disable DTP.

• Disable STP.

• Enable port security.

• Place unused ports in an unused VLAN.

89. A network engineer is troubleshooting a newly deployed wireless network that is using the latest 802.11 standards. When users access high bandwidth services such as streaming video, the wireless network performance is poor. To improve performance the network engineer decides to configure a 5 Ghz frequency band SSID and train users to use that SSID for streaming media services. Why might this solution improve the wireless network performance for that type of service?

• Requiring the users to switch to the 5 GHz band for streaming media is inconvenient and will result in fewer users accessing these services.

• The 5 GHz band has more channels and is less crowded than the 2.4 GHz band, which makes it more suited to streaming multimedia.

• The 5 GHz band has a greater range and is therefore likely to be interference-free.

• The only users that can switch to the 5 GHz band will be those with the latest wireless NICs, which will reduce usage.

90. Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

• broadcast DHCPACK

• broadcast DHCPREQUEST

• unicast DHCPACK

• unicast DHCPREQUEST