CCNA 2 MIDTERM

what does a switch use to locate and load the IOS image?

BOOT environment variable

after which step of the switch bootup sequence is the boot loader executed?

after POST execution

an Ipv6-enabled interface is required to have which type of address?

link-local

If one end of an Ethernet connection is configured for full duplex and the other end of the connection is configured for half duplex, where would late collisions be observed?

on the half-duplex end of the connection

what impact does adding a layer 2 switch have on a network?

an increase in the size of the broadcast domain

what is the characteristic of an IPv4 loopback interface on a Cisco IOS router?

it is a logical interface internal to the router 

what is the minimum ethernet frame size that will not be discarded by the receiver as a runt frame?

64 bytes

which command displays information about the auto-MDIX setting for a specifc interface?

show controllers

Which command is used to set the BOOT environment variable that defines where to find the IOS image file on a switch?

boot system

Which command will display a summary of all IPv6-enabled interfaces on a router that includes the IPv6 address and operational status?

show ipv6 interface brief

which protocol adds security to remote connections?

SSH

Which statement describes SVIs?

a default SVI is created for VLAN 1 for switch administration

what must an administrator have in order to reset a lost password on a router?

physical access to the router

What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?

crossover

what advantage does SSH offer over Telnet?

encryption

which switch component reduces the amount of packet handling time inside the switch?

ASIC

How do switch buffers affect network performance?

 

They store frames received, thus preventing premature frame discarding when network congestion occurs.

refer to the exhibit. How many broadcast domains are displayed?

8

what the term “port density” represent for an ethernet switch?

the number of avaliable ports

what information is added to the switch table from incoming frames?

source MAC address and incoming port number

what is the significant difference between a hub and a layer 2 LAN switch?

 

A hub extends a collision domain, and a switch divides collision domains.

What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?

 

Forward the frame out all ports except the port where the frame was received.

which characteristic describes cut-through switching?

frames are forwarded without any error checking

which device separates broadcast domains?

router

which impact does adding a layer 2 switch have on a network?

an increase in the size of the broadcast domain

which network device can be used to eliminate collisions on an ethernet network?

switch

which statement is correct about ethernet switch frame forwarding decisions?

frame forwarding decisions are based on MAC address and port mappings in the CAM table

which switch characteristic helps traffic local and alleviate network congestion?

high port density

which switching method ensures tha the incoming frame is error free before forwarding?

store-and-forward

which type of address does a switch use to build the MAC address table?

source MAC address

PC1 is unable to communicate with server 1. The network administrator issues the show interfaces trunk command to begin troubleshooting. What conclusion can be made based on the output of this command?

interface g0/2 is not configured as a trunk

A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?

it allows only VLAN 30 on f0/5

A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?

only devices in VLAN 20 see the frame

for what reason would a network administrator use the show interfaces trunk command on a switch?

to view the native VLAN

in which memory location are the VLAN configurations of normal range VLANs stored on a catalyst switch?

flash

on a switch that is configured with multiple VLANs, which command will remove only VLAN 100 from the switch?

switch(config)# no vlan 100

Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?

port f0/11 will be returned to vlan 1

under which two occasions should an administrator disable DTP while managing a local area network? (Choose two.)

-When connecting a Cisco switch to a non-Cisco switch

-On links that should not be trunking

what happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?

the port becomes inactive

what happens to switch ports after the VLAN which they are assigned is deleted?

the ports stop communicating with attached devices

which command displays the encapsulation type, the voice VLAN ID, and the access mode VLAN for the fa0/1 interface?

show interfaces fa0/1 switchport

Which four steps are needed to configure a voice VLAN on a switch port? (Choose four)

-Assign the voice VLAN to the switch port.

-Ensure that voice traffic is trusted and tagged with a CoS priority value.

-  Add a voice VLAN.

-Configure the switch port in access mode.

Which two characteristics describe the native VLAN? (Choose two.)

-The native VLAN traffic will be untagged across the trunk link.

-The native VLAN provides a common identifier to both ends of a trunk.

A PC is to access a web server on another network. Which inter-VLAN method will provide the highest bandwidth at Layer 3 and also provide a default gateway for the PC?

multilayer switch with routing enabled

A high school uses VLAN15 for the laboratory network and VLAN30 for the faculty network. What is required to enable communication between these two VLANs while using the router-on-a-stick approach?

a switch with a port that is configured as a trunk is needed when connecting to the router

how is traffic routed between multiple VLANs on a multilayer switch?

traffic is routed via internal VLAN interfaces

what is a characteristic of a routed port on a layer 3 switch>

it is not assigned to a VLAN

what is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command?

the VLAN ID

when configuring a router as part of a router-on-a-stick inter-VLAN routing topology, where should the IP address be assigned?

to the subinterface

When routing a large number of VLANs, what are two disadvantages of using the router-on-a-stick inter-VLAN routing method rather than the multilayer switch inter-VLAN routing method? (Choose two.)

-A dedicated router is required.

-Multiple subinterfaces may impact the traffic flow speed.

While configuring inter-VLAN routing on a multilayer switch, a network administrator issues the no switchport command on an interface that is connected to another switch. What is the purpose of this command?

to create a routed port for a single network

A set of switches is being connected in a LAN topology. Which STP bridge priority value will make it least likely for the switch to be selected as the root?

61440

An administrator is troubleshooting a switch and wants to verify if it is a root bridge. What command can be used to do this?

show spanning tree

choose the best description of IEEE 802.1D

the legacy standard for STP that runs all VLANs in a single spanning tree instance 

choose the best description of MSTP

a protocol that allows multiple VLANs to run in a single spanning tree instance

choose the best description of RSTP

an evolution of STP that provides faster convergence

choose the best description of Rapid PVST+

a cisco enhancement of RSTP to provide a spanning tree instance for each VLAN

if no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?

the lowest MAC address

in which two PVST+ port states that MAC addresses are learned (Choose two)

-learning

-forwarding

In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)

-learning

-listening

What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network? (Choose two.)

-The MAC address table becomes unstable.

-Broadcast frames are transmitted indefinitely.

what is a characteristic of spanning tree?

it is enabled by default on Cisco switches

what is the only way to correct a spanning tree failure?

manually remove redundant links in the switched network

what is the function of STP in a scalable network?

it disables redundant paths to eliminate layer 2 loops

what is the outcome of a layer 2 broadcast storm?

new traffic is discarded by the switch because it is unable to be processed

what is the purpose of the spanning tree protocol (STP)?

prevents layer 2 loops

what is the value used to determine which port on a non-root bridge will become a root port in a STP network?

the path cost

what value determines the root bridge when all switches connected by trunk links have default STP configurations?

MAC address

When the show spanning-tree vlan 33 command is issued on a switch, three ports are shown in the forwarding state. In which two port roles could these interfaces function while in the forwarding state? (Choose two.)

-designated

-root

which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?

root port

which port role is assigned to the switch port that has the lowest cost to reach the root bridge?

root port

which port state will switch ports immediately transition to when configured for PortFast?

forwarding

Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same physical and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root guard, and loop guard?

MST

which spanning tree standard supports only one root bridge so that traffic from all VLANs flows over the same path?

802.1D

Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose two.)

 -removing single points of failure with multiple Layer 2 switches

 -redundant links between Layer 2 switches

which three components are combined to form a bridge ID?

-extended system ID

-MAC address

-bridge priority

which statement is true regarding the use of PAgP to create EtherChannels?

it is cisco proprietary

A network administrator configured an EtherChannel link with three interfaces between two switches. What is the result if one of the three interfaces is down?

the remaining two interfaces continue to load balance traffic

A network administrator has configured an EtherChannel between two switches that are connected via four trunk links. If the physical interface for one of the trunk links changes to a down state, what happens to the EtherChannel?

the EtherChannel will remain functional

A network administrator is configuring an EtherChannel link between switches SW1 and SW2 by using the command SW1(config-if-range)# channel-group 1 mode auto . Which command must be used on SW2 to enable this EtherChannel?

SW2(config-if-range)#channel-group 1 mode desirable

A network administrator is configuring an EtherChannel link between two physical ports on a switch. Which statement describes the result when one of the physical ports fails?

the EtherChannel continues transmitting data with reduced bandwidth

what are two advantages of EtherChannel? (Choose two)

-Configuring the EtherChannel interface provides consistency in the configuration of the physical links.

-Spanning Tree Protocol views the physical links in an EtherChannel as one logical connection.

what are two advantages of using LACP? (Choose two)

-it allows directly connected switches to negotiate an EtherChannel link

-it allows the use of multivendor devices

what are two load balancing methods in the EtherChannel technology? (Choose two)

-source IP to destination IP

-source MAC to destination MAC

What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)

-All the interfaces need to work at the same speed.

-All the interfaces need to be working in the same duplex mode.

When EtherChannel is configured, which mode will force an interface into a port channel without exchanging aggregation protocol packets?

on

When EtherChannel is implemented, multiple physical interfaces are bundled into which type of logical connection?

port channel

when a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation?

active

When a range of ports is being configured for EtherChannel, which mode will configure PAgP so that it initiates the EtherChannel negotiation?

desirable

Which mode configuration setting would allow formation of an EtherChannel link between switches SW1 and SW2 without sending negotiation traffic?

SW1: on; SW2: on

which statement describes a characteristic of EtherChannel?

it is made by combing multiple physical links that are seen as one link between two switches

which statement describes an EtherChannel implementation?

a trunked port can be part of an EtherChannel bundle

which statement is true about EtherChannel technology?

EtherChannel uses existing switch ports

which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?

LACP

which three interface parameters must match for an EtherChannel to form? (Choose three)

-trunking mode

-allowed VLANs

-native VLAN

which two channel group modes would place an interface in a negotiating state using PAgP? (choose two)

-desirable

-auto

Which two parameters must match on the ports of two switches to create a PAgP EtherChannel between the switches? (Choose two.)

-VLAN information

-speed

what is an advantage of configuring a Cisco router as a relay agent?

it can provide relay services for multiple UDP services

 A host PC is attempting to lease an address through DHCP. What message is sent by the server to let the client know it is able to use the provided IP information?

DHCPACK

A client device on an Ethernet segment needs an IP address in order to communicate on the network. A DHCP server with IP address 192.168.1.1 has been configured and enabled on the network. How will a client device obtain a usable IP address for this network?

send a DHCPDISCOVER message to physical address FF-FF-FF-FF-FF-FF