chapter 1-4 test CNT 150

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. A hub divides collision domains, and a switch divides broadcast domains. A hub forwards frames, and a switch forwards only packets. Each port of a hub is a collision domain, and each port of a switch is a broadcast domain.

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

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? Two groups of switches are needed, each with ports that are configured for one VLAN. A switch with a port that is configured as a trunk is needed when connecting to the router. A router with at least two LAN interfaces is needed. A multilayer switch is needed.

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

What does a switch use to locate and load the IOS image? BOOT environment variable startup-config POST NVRAM IOS image file

BOOT environment variable

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. Cut-through frame forwarding ensures that invalid frames are always dropped. Only frames with a broadcast destination address are forwarded out all active switch ports. Unicast frames are always forwarded regardless of the destination MAC address.

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

Which characteristic describes cut-through switching? Buffering is used to support different Ethernet speeds. Frames are forwarded without any error checking. Error-free fragments are forwarded, so switching occurs with lower latency. Only outgoing frames are checked for errors.

Frames are forwarded without any error checking.

Refer to the exhibit. 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. The DTP mode is incorrectly set to dynamic auto on interface G0/1. The encapsulation on interface G0/1 is incorrect. VLAN 20 has not been created.

Interface G0/2 is not configured as a trunk.

Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement? Use SSH version 1. Reconfigure the RSA key. Configure SSH on a different line. Modify the transport input command.

Modify the transport input command.

Which impact does adding a Layer 2 switch have on a network? an increase in the number of dropped framesan increase in the size of the broadcast domain an increase in the number of network collisionsan increase in the size of the collision domain

an increase in the size of the broadcast domain

Refer to the exhibit. A network administrator has configured router CiscoVille with the above commands to provide inter-VLAN routing. What type of port will be required on a switch that is connected to Gi0/0 on router CiscoVille to allow inter-VLAN routing? routed port trunk port SVI access port

trunk port

On a switch that is configured with multiple VLANs, which command will remove only VLAN 100 from the switch? Switch(config)# no vlan 100 Switch(config-if)# no switchport access vlan 100 Switch# delete flash:vlan.dat Switch(config-if)# no switchport trunk allowed vlan 100

Switch(config)# no vlan 100

Refer to the exhibit. A technician is programming switch SW3 to manage voice and data traffic through port Fa0/20. What, if anything, is wrong with the configuration? There is nothing wrong with the configuration. Interface Fa0/20 can only have one VLAN assigned. The mls qos trust cos command should reference VLAN 35. The command used to assign the voice VLAN to the switch port is incorrect.

The command used to assign the voice VLAN to the switch port is incorrect.

Refer to the exhibit. All workstations are configured correctly in VLAN 20. Workstations that are connected to switch SW1 are not able to send traffic to workstations on SW2. What could be done to remedy the problem? Allow VLAN 20 on the trunk link. Enable DTP on both ends of the trunk. Configure all workstations on SW1 to be part of the default VLAN. Configure all workstations on SW2 to be part of the native VLAN.

Allow VLAN 20 on the trunk link.

Refer to the exhibit. A network administrator is configuring RT1 for inter-VLAN routing. The switch is configured correctly and is functional. Host1, Host2, and Host3 cannot communicate with each other. Based on the router configuration, what is causing the problem? Interface Fa0/0 is missing IP address configuration information. Routers do not support 802.1Q encapsulation on subinterfaces. IP addresses on the subinterfaces are incorrectly matched to the VLANs. Each subinterface of Fa0/0 needs separate no shutdown commands.

IP addresses on the subinterfaces are incorrectly matched to the VLANs.

A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw# configure terminal command? It enters the global configuration mode. It saves the running configuration to NVRAM. It disables a virtual or physical switch interface. It updates the MAC address table for the associated port. It saves the startup configuration to the running configuration.

It enters the global configuration mode.

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 subinterface. It identifies the VLAN number. It identifies the native VLAN number. It identifies the type of encapsulation that is used. It identifies the number of hosts that are allowed on the interface.

It identifies the VLAN number.

A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame? Devices in VLAN 20 and the management VLAN see the frame. Only devices that are connected to the local switch see the frame. Only devices in VLAN 20 see the frame. All devices in all VLANs see the frame.

Only devices in VLAN 20 see the frame.

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 Fa0/11 will be shutdown. Port Fa0/11 will be returned to VLAN 1. An error message would be displayed. VLAN 30 will be deleted.

Port Fa0/11 will be returned to VLAN 1.

Which two statements are correct with respect to SVI inter-VLAN routing? (Choose two.) Switching packets is faster with SVI. There is no need for a connection to a router. Virtual interfaces support subinterfaces. SVIs can be bundled into EtherChannels. SVIs eliminate the need for a default gateway in the hosts.

Switching packets is faster with SVI. There is no need for a connection to a router.

A network administrator issues the show vlan brief command while troubleshooting a user support ticket. What output will be displayed?

The VLAN assignment and membership for all switch ports

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 command interface GigabitEthernet0/0.5 was entered incorrectly. Gi0/0 is not configured as a trunk port. There is no IP address configured on the interface Gi0/0. The encapsulation dot1Q 5 command contains the wrong VLAN. The no shutdown command is not entered on subinterfaces.

The encapsulation dot1Q 5 command contains the wrong VLAN.

How do switch buffers affect network performance? They provide extra memory for a particular port if autonegotiation of speed or duplex fails. They hold data temporarily when a collision occurs until normal data transmission resumes. They provide error checking on the data received. They store frames received, thus preventing premature frame discarding when network congestion occurs.

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

Which solution would help a college alleviate network congestion due to collisions? a firewall that connects to two Internet providers a high port density switch a router with two Ethernet ports a router with three Ethernet ports

a high port density switch

Which command is used to set the BOOT environment variable that defines where to find the IOS image file on a switch? boot loader config-register confreg boot system Navigation Bar

boot system

Which type of VLAN is used to designate which traffic is untagged when crossing a trunk port?

native

What type of VLAN supports untagged traffic? native VLAN voice VLAN security VLAN management VLAN

native VLAN

Refer to the exhibit. A network administrator has configured R1 as shown. When the administrator checks the status of the serial interface, the interface is shown as being administratively down. What additional command must be entered on the serial interface of R1 to bring the interface up? IPv6 enable clockrate 128000 end no shutdown

no shutdown

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? only on serial interfaces on the full-duplex end of the connection on the half-duplex end of the connection on both ends of the connection

on the half-duplex end of the connection

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 show interfaces trunk show mac address-table interface Fa0/1 show vlan brief Navigation Bar

show interfaces Fa0/1 switchport

Which switching method ensures that the incoming frame is error-free before forwarding? cut-through fragment free FCS store-and-forward

store-and-forward

Refer to the exhibit. A network administrator has configured router CiscoVille with the above commands to provide inter-VLAN routing. What command will be required on a switch that is connected to the Gi0/0 interface on router CiscoVille to allow inter-VLAN routing?​ switchport mode access switchport mode trunk switchport mode dynamic desirable no switchport

switchport mode trunk

Refer to the exhibit. A switch receives a Layer 2 frame that contains a source MAC address of 000b.a023.c501 and a destination MAC address of 0050.0fae.75aa. Place the switch steps in the order they occur. (Not all options are used.)

The switch adds the source MAC address to the MAC address table: Occurs first. Because the destination is not known, the switch forwards the frame out all ports except the port through which the frame arrived: Occurs second

Refer to the exhibit. A network administrator is reviewing port and VLAN assignments on switch S2 and notices that interfaces Gi0/1 and Gi0/2 are not included in the output. Why would the interfaces be missing from the output? They are configured as trunk interfaces. They are administratively shut down. There is no media connected to the interfaces. There is a native VLAN mismatch between the switches.

They are configured as trunk interfaces.