Ccna routing and Switching Complete Study Guide

B.  802.1q is Cisco proprietary.

C.  ISL encapsulates the frame with control information; 802.1q inserts an 802.1q field 

along with tag control information.

D.  ISL is a standard.

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Assessment Test

55.  The protocol data unit (PDU) encapsulation is completed in which order?

A.  Bits, frames, packets, segments, data

B.  Data, bits, segments, frames, packets

C.  Data, segments, packets, frames, bits

D.  Packets, frames, bits, segments, data

56.  Based on the configuration shown below, what statement is true?

S1(config)#

ip routing

S1(config)#

int vlan 10

S1(config-if)#

ip address 192.168.10.1 255.255.255.0

S1(config-if)#

int vlan 20

S1(config-if)#

ip address 192.168.20.1 255.255.255.0

A.  This is a multilayer switch.

B.  The two VLANs are in the same subnet.

C.  Encapsulation must be configured.

D.  VLAN 10 is the management VLAN.

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Answers to Assessment Test

1.  B.  To allow for the PVST+ to operate, there’s a field inserted into the BPDU to accommo-

date the extended system ID so that PVST+ can have a root bridge configured on a per-STP 

instance. The extended system ID (VLAN ID) is a 12-bit field, and we can even see what 

this field is carrying via 

show spanning-tree command output. See Chapter 15 for more 

information.

2.  A.  Cisco’s EtherChannel can bundle up to eight ports between switches to provide resil-

iency and more bandwidth between switches.  See Chapter 15 for more information.

3.  B, C, E.  All the ports on both sides of every link must be configured exactly the same 

between switches or it will not work. Speed, duplex, and allowed VLANs must match. See 

Chapter 15 for more information.

4.  C.  2100 boots the router into ROM monitor mode, 2101 loads the mini-IOS from ROM, 

and 2102 is the default and loads the IOS from flash. See Chapter 8 for more information.

5.  D. The 

show license udi command displays the unique device identifier (UDI) of 

the router, which comprises the product ID (PID) and serial number of the router. See 

 Chapter 8 for more information.

6.  B. The 

show license feature command allows you to view the technology package 

licenses and feature licenses that are supported on your router along with several status 

variables related to software activation and licensing, both licensed and unlicensed features. 

See Chapter 8 for more information.

7.  C, D, F.  The SDN architecture slightly differs from the architecture of traditional net-

works. It comprises three stacked layers: Data, Control and Application. See Chapter 8 for 

more information.

8.  B.  There are eight different trap levels. If you choose, for example level 3, level 0 through 

level 3 messages will be displayed. See Chapter 8 for more information.

9.  B, D.  Each stack of switches has a single IP address and is managed as a single object. 

This single IP management applies to activities such as fault detection, VLAN creation and 

modification, security, and QoS controls. Each stack has only one configuration file, which 

is distributed to each member in the stack. When you add a new switch to the stack, the 

master switch automatically configures the unit with the currently running IOS image and 

the configuration of the stack. You do not have to do anything to bring up the switch before 

it is ready to operate. See chapter 22 for more information.

10.  B.  There is no IPv6 default gateway listed in the output, which will be the link-local 

address of the router interface, sent to the host as a router advertisement. Until this host 

receives the router address, the host will communicate with IPv6 only on the local subnet. 

See Chapter 20 for more information.

11.  D.  The command 

show ipv6 neighbors provides the ARP cache for on a router. See 

Chapter 20 for more information.

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