Fnals ch8

On a Cisco switch, what would the security association identifier be for VLAN 13?

100013

A network with 10 bits remaining for the host portion will have how many usable host addresses?

1022

Given a host IP address of 172.16.1.154 and a subnet mask of 255.255.254.0, what is the network ID for this host?

172.16.0.0

A network with a CIDR notation of /26 would have what subnet mask?

255.255.255.192

How large is the 802.1Q tag that is added to an Ethernet frame when using VLANs?

4 bytes

What is the maximum number of host IP addresses that can exist in a Class B network?

65,534

What IEEE standard specifies how VLAN information appears in frames and how switches interpret that information?

802.1Q

When using IPv6, what would a /64 network likely be assigned to?

A smaller organization or business.

Which of the following suggestions can help prevent VLAN hopping attacks on a network?

Disable auto trunking and move native VLANs to unused VLANs.

A native VLAN mismatch occurs when two access ports that are connected to each other are both tagging traffic with different VLAN IDs. True False

False

All that is needed to provide communication between two VLANs is a DHCP relay agent. True False

False

An unmanaged switch can still support the creation of VLANs, provided there is an interface for configuration. True False

False

Network segmentation decreases both performance and security on a network. True False

False

Only Class B and Class C networks can be subnetted. True False

False

When an 802.1Q tag is added to an Ethernet frame, where is it placed?

It is inserted between the source address and the Ethernet type field.

What does the VLAN Trunk Protocol (VTP) do?

It shares VLAN database information amongst switches that participate.

With VTP, where is the VLAN database stored?

On the switch that is known as the stack master.

In an IPv6 address, what do the first four blocks or 64 bits of the address represent?

The site prefix or global routing prefix.

A /24 CIDR block is equivalent to a 255.255.255.0 subnet mask. True False

True

By default, the native VLAN is the same as the default VLAN. True False

True

IPv6 addressing does not utilize classful addressing; therefore every IPv6 address is classless. True False

True

Network segmentation at Layer 2 of the OSI model is accomplished using VLANs. True False

True

To identify the transmissions that belong to each VLAN, a switch will add a tag to Ethernet frames that identifies the port through which they arrive at the switch. True False

True

An interface that manages traffic from multiple VLANs is known by what term?

Trunk Port

On certain Cisco products, what command can be used to create and send helper messages that support several types of UDP traffic, including DHCP, TFTP, DNS, and TACACS+?

ip helper-address

Which of the following terms is commonly used to describe a VLAN configuration in which one router connects to a switch that supports multiple VLANs?

router-on-a-stick

What command will set the native VLAN on a Juniper switch port?

set native-vlan-id

You are working on a Cisco switch and need to learn what VLANs exist on the switch. Which command will list the current VLANs recognized by the switch?

show vlan

A subnet of 255.255.248.0 can be represented by what CIDR notation?

/21