Networking Cisco IOS Commands and VLAN Configuration Quiz

Which tasks can be accomplished using the command history feature?

View a list of commands entered in a previous session, Recall previously entered commands.

What is the first action in the boot sequence when a switch is powered on?

Low-level CPU initialization.

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

Physical access to the router.

When configuring a switch for SSH access using login local, what other command is required?

Username username secret secret.

Which command displays information about the auto-MDIX setting for a specific interface?

Show controllers.

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

On the half-duplex end.

Which command sets the BOOT environment variable defining where to find the IOS image file?

Boot system.

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

BOOT environment variable.

Which protocol adds security to remote connections?

SSH.

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

Logical interface internal to the router.

What is the minimum Ethernet frame size that will not be discarded as a runt frame?

64 bytes.

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

After POST execution.

Which impact does adding a Layer 2 switch have on a network?

Increase in size of broadcast domain.

Which characteristic describes cut-through switching?

Frames forwarded without any error checking.

What is the significant difference between a hub and a Layer 2 LAN switch?

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

Which statement is correct about Ethernet switch frame forwarding decisions?

Based on MAC address and port mappings in the CAM table.

How do switch buffers affect network performance?

Store frames, preventing premature discarding during congestion.

Which switch characteristic helps keep traffic local and alleviates congestion?

High port density.

Which switch component reduces packet handling time inside the switch?

ASIC.

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

Source MAC address and incoming port number.

Which switching method ensures the incoming frame is error-free before forwarding?

Store-and-forward.

How many broadcast domains are displayed in a network with 4 router-to-router links and 4 LANs?

4.

Under which two occasions should an administrator disable DTP?

Connecting Cisco switch to non-Cisco switch, links that should not be trunking.

Which two characteristics describe the native VLAN?

Native VLAN traffic untagged across trunk link, provides common identifier to both ends of a trunk.

Which command removes only VLAN 100 from the switch?

No vlan 100 (global).

Why are interfaces Gi0/1 and Gi0/2 missing from show vlan brief output?

Configured as trunk interfaces.

What happens when a device in VLAN 20 sends a broadcast Ethernet frame?

Only devices in VLAN20 see it.

What fixes the issue when workstations on SW1 (VLAN20) cannot reach workstations on SW2 (VLAN20)?

Allow VLAN 20 on the trunk link.

What happens to switch ports after the VLAN they're assigned to is deleted?

Ports assigned to VLAN1 (default).

In what switch mode should port G0/1 be assigned for inter-VLAN routing?

Trunk.

What happens if 'no switchport access vlan 30' is entered on port Fa0/11?

Port Fa0/11 returned to VLAN 1.

Which command displays encapsulation type, voice VLAN ID, and access mode VLAN for Fa0/1?

Show interfaces Fa0/1 switchport.

What is wrong when programming SW3 for voice/data on Fa0/20?

The command to assign the voice VLAN is incorrect.

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

Assign voice VLAN to switch port, activate spanning-tree PortFast, ensure voice traffic trusted/tagged with CoS, configure switch port in access mode.

What is the conclusion if 'show interfaces trunk' shows G0/2 of DLS1 missing from output?

Interface G0/2 not configured as trunk.

What causes the error in the inter-VLAN routing config on router CiscoVille?

Encapsulation dot1Q 20 command not configured.

What command is required on the switch connected to Gi0/0 on CiscoVille to allow inter-VLAN routing?

Not specified in the provided notes.

What is required for router-on-a-stick to enable communication between VLAN15 and VLAN30?

A switch with a port configured as trunk connecting to the router

What are two disadvantages of router-on-a-stick vs multilayer switch inter-VLAN routing?

A dedicated router is required, Multiple subinterfaces may impact traffic flow speed

What are two configuration errors on switch interface Gi1/1 that prevent PCs on different VLANs from communicating?

Gi1/1 is in the default VLAN, Gi1/1 configured as trunk mode

What is a possible cause for PC2 not being able to communicate with PC1?

encapsulation dot1Q 5 command contains wrong VLAN

What type of port is required on a switch connected to Gi0/0 on router CiscoVille?

routed port

What is the cause of Host1, Host2, Host3 not being able to communicate via router RT1?

IP addresses on subinterfaces incorrectly matched to VLANs

What is a likely error if PCs on VLAN45 can't reach PCs on VLAN30?

Incorrect IP address configured on Gi0/0.30

What is a characteristic of a routed port on a Layer 3 switch?

It is not assigned to a VLAN

How many subinterfaces are needed for router-on-a-stick if multiple devices are on different VLANs?

4

What is the effect of 'mdix auto' on an interface?

auto-adjusts for straight-through or crossover cable

What does 'ip address 172.18.33.88 255.255.255.0' do in interface config mode?

applies IPv4 address to the virtual interface

What is the effect of the 'configure terminal' command from privileged EXEC mode?

enters global configuration mode

What does the 'shutdown' command do in interface config mode?

disables a virtual/physical switch interface

What is the effect of 'ipv6 address 2001:db8:a2b4:88::1/64' in interface config mode?

applies IPv6 address to the virtual interface

What is the effect of the 'exit' command in interface config mode?

returns to global configuration mode

What is the effect of the 'enable' command from user EXEC mode?

enters privileged mode

What is the effect of the 'duplex full' command?

allows data to flow both directions simultaneously

What type of VLAN should not carry voice and network management traffic?

data VLAN

What type of VLAN is designed to reserve bandwidth for IP Phone quality?

voice VLAN

What type of VLAN is initially the management VLAN?

default VLAN

What type of VLAN is designed to have a delay of less than 150 ms across the network?

voice VLAN

What type of VLAN is used to separate the network into groups of users or devices?

data VLAN

What type of VLAN is configured specifically for traffic such as SSH, Telnet, HTTPS, HTTP, and SNMP?

management VLAN

What type of VLAN supports untagged traffic?

native VLAN

What command brings R1's serial interface up if it shows administratively down?

no shutdown

How can a network admin allow SSH and prohibit Telnet on Switch1?

Modify the transport input command

Which solution helps alleviate network congestion due to collisions?

a high port density switch

What are two correct statements about SVI inter-VLAN routing?

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

What does the '?' in 'encapsulation dot1q ?' identify?

It identifies the VLAN number

What type of VLAN designates traffic as untagged when crossing a trunk port?

native

What output does 'show vlan brief' display?

VLAN assignment/membership for all switch ports

What message is displayed when 10.10.10.1 is entered into the PC1 web browser address bar?

Test Server