CCNA 2 85-105

What network attack seeks to create a DoS for clients by preventing them from being able to obtain a DHCP lease?

DHCP starvation

What protocol should be disabled to help mitigate VLAN attacks?

DTP

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

Enable port security.

What protocol or technology uses source IP to destination IP as a load-balancing mechanism?

EtherChannel

Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?

It identifies the VLAN number.

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 virtual router

Refer to the exhibit. A networkadministrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)

R1(config-if) # ip helper-address 10.2.0.250 R1(config)# interface G0/0

Which protocol adds security to remote connections?

SSH

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?

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.

Refer to the exhibit. If the IP addresses of the default gateway router and the DNS server are correct, what is the configuration problem?

The IP address of the default gateway router is not contained in the excluded address list.

Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?

The encapsulation dot1Q 5 command contains the wrong VLAN.

After a host has generated an IPv6 address by using the DHCPv6 or SLAAC process, how does the host verify that the address is unique and therefore usable?

The host sends an ICMPv6 neighbor solicitation message to the DHCP or SLAAC-learned address and if no neighbor advertisement is returned, the address is considered unique.

What protocol or technology requires switches to be in server mode or client mode?

VTP

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?

a key that matches the key on the AP

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

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

broadcast DHCPREQUEST

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 s0/0/0 121

What command will enable a router to begin sending messages that allow it to configure a link-local address without using an IPv6 DHCP server?

the ipv6 unicast-routing command

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

to enhance user bandwidth to isolate traffic between segments