Networking 2: Infrastructure Switching/Routing

Winter/Spring 2026

True or False? VLANs improve network performance by segmenting broadcast domains.

True

True or False? VLANs can improve security by isolating sensitive data from the rest of the network.

True

Which type of VLAN is assigned to 802.1Q trunk ports to carry untagged traffic?

True or False? It is a best practice to configure the native VLAN as VLAN 1.

False

Refer to Question 1 topology. PC 1 sends an ARP broadcast frame. Which PC will receive the broadcast frame?

PC 4

Refer to Question 2 topology. PC 2 sends an ARP broadcast frame. Which PCs will receive the broadcast frame?

PCs 3, 4, 6

Refer to Question 3 topology. PC 3 sends an ARP broadcast frame. Which PC will receive the ARP broadcast frame?

PC 5

True or False? VLANs improve network performance by segmenting broadcast domains. Options: True, False

TRUE

True or False? VLANs can improve security by isolating sensitive data from the rest of the network. Options: False, True

TRUE

Which type of VLAN is assigned to 802.1Q trunk ports to carry untagged traffic? Options: Management, Default, Data, Native

Native

True or False? It is a best practice to configure the native VLAN as VLAN 1. Options: True, False

FALSE

Which is true of VLAN 1? Options: The native VLAN is VLAN 1 by default; All switch ports are assigned to VLAN 1 by default; VLAN 1 cannot be renamed or deleted; The management VLAN is VLAN 1 by default

All listed options are correct

True or false? DTP is an open standard IEEE protocol that specifies auto negotiation of switch trunk links. Options: False, True

FALSE

What is the default switchport mode for Cisco Catalyst switches? Options: Trunk, Dynamic auto, Access, Dynamic desirable

Dynamic auto

True or false? Two switchports on a link both configured as dynamic auto will successfully negotiate a trunk. Options: True, False

FALSE

Which two DTP modes will form a trunk with an interface that is configured as dynamic auto? Options: Access, Trunk, Dynamic auto, Dynamic desirable

Trunk and Dynamic desirable

What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch? Options: The port becomes inactive; The port goes back to the default VLAN; The port automatically associates itself with the native VLAN; The port creates the VLAN again

The port becomes inactive

In which memory location are the VLAN configurations of normal range VLANs stored on a Catalyst switch? Options: Flash; NVRAM; RAM; ROM

Flash

A network administrator is investigating a trunk link failure between a Cisco switch and a switch from another vendor. What is the probable cause if trunk negotiation fails? Options: Both switches are in trunk mode; Both switches are in nonegotiate mode; Switches from other vendors do not support DTP; DTP frames are flooding the entire network

Switches from other vendors do not support DTP

What is the purpose of the vlan.dat file on a switch? Options: It holds the running configuration; It holds the saved configuration; It holds the VLAN database; It holds the operating system

It holds the VLAN database

What is the purpose of setting the native VLAN separate from data VLANs? Options: The native VLAN is for carrying VLAN management traffic only; The security of management frames that are carried in the native VLAN can be enhanced; A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs; The native VLAN is for routers and switches to exchange their management information, so it should be different from data VLANs

A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs

When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default? Options: Unused VLAN ID; Native VLAN ID; Data VLAN ID; Management VLAN ID

Native VLAN ID

A network administrator is determining the best placement of VLAN trunk links. Which two types of point-to-point connections utilize VLAN trunking? Options: Between two switches that utilize multiple VLANs; Between a switch and a client PC; Between a switch and a server that has an 802.1Q NIC; Between a switch and a network printer; Between two switches that share a common VLAN

Between two switches that utilize multiple VLANs; Between a switch and a server that has an 802.1Q NIC

What are three primary benefits of using VLANs? Options: Security; Cost reduction; Improved IT Staff efficiency; A reduction in the number of trunk links; End user satisfaction

Security; Cost reduction; Improved IT Staff efficiency

On a Cisco switch, where is extended range VLAN information stored? Options: Running configuration file; Startup configuration file; NVRAM; Flash

Running configuration file

In which location are the normal range VLANs stored on a Cisco switch by default? Options: Flash memory; Startup-config; Running-config; RAM

Flash memory

Which distinct type of VLAN is used by an administrator to access and configure a switch? Options: Default VLAN; Native VLAN; Data VLAN; Management VLAN

Management VLAN

For what reason would a network administrator use the show interfaces trunk command on a switch? Options: To view the native VLAN; To examine DTP negotiation as it occurs; To verify port association with a particular VLAN; To display an IP address for any existing VLAN

To view the native VLAN

Where is the vlan.dat file stored on a switch? Options: In RAM; In NVRAM; In flash memory; On the externally attached storage media or internal hard drive

In flash memory

If an organization is changing to include Cisco IP phones in its network, what design feature must be considered to ensure voice quality? Options: Voice traffic needs to be tagged with the native VLAN; A separate VLAN is needed for voice traffic; Additional switch ports that are dedicated to Cisco IP phones are required; Voice traffic and data traffic require separate trunk links between switches

A separate VLAN is needed for voice traffic

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? Options: It allows VLANs 1 to 30 on Fa0/5; It allows VLANs 10, 20, and 30 on Fa0/5; It allows only VLAN 30 on Fa0/5; It allows a native VLAN of 30 to be implemented on Fa0/5

It allows only VLAN 30 on Fa0/5

You are troubleshooting an inter-VLAN issue and need to verify that the subinterfaces are in the routing table. Options: show ip route; show vlan; show interfaces interface-id switchport; show ip interface brief; show interfaces

show ip route

You are troubleshooting an inter-VLAN issue and need to check the list of VLANs and their assigned ports. Options: show interfaces interface-id switchport; show ip interface brief; show vlan; show interfaces; show ip route

show vlan

You are troubleshooting an inter-VLAN issue and need to verify the status of an access port and its access mode VLAN. Options: show vlan; show ip route; show interfaces; show interfaces interface-id switchport; show ip interface brief

show interfaces interface-id switchport

You are troubleshooting an inter-VLAN issue and need to verify the status and IP address of all interfaces in a condensed format. Options: show ip route; show ip interface brief; show interfaces; show interfaces interface-id switchport; show vlan

show ip interface brief

A PC is to access a web server on another network. Which inter-VLAN method provides the highest bandwidth at Layer 3 and a default gateway? Options: Router on a stick; Multilayer switch with routing enabled; Trunked interface between router and switch; Multiple physical router interfaces

Multilayer switch with routing enabled

Which scalable method provides inter-VLAN routing on a switched network with more than 1000 VLANs? Options: Router subinterfaces; Static routes on L2 switch; Routing internally on L3 switch; Multiple physical router interfaces

Routing internally on a Layer 3 switch

When configuring router-on-a-stick, where is the IP address assigned? Options: Interface; Subinterface; SVI; VLAN

Subinterface

What is needed to enable communication between VLAN 10 and VLAN 20 using legacy inter-VLAN routing? Options: Trunk port to router; Router with one VLAN interface; Two switch groups; Router with at least two LAN interfaces

Router with at least two LAN interfaces

What is a disadvantage of using multilayer switches for inter-VLAN routing? Options: Limited to trunk links; Must disable spanning tree; Higher latency; More expensive than router-on-a-stick

More expensive than router-on-a-stick

Which inter-VLAN design requires multiple subinterfaces? Options: Management VLAN routing; Router on a stick; Legacy inter-VLAN routing; Multilayer switch routing

Router on a stick

What is a disadvantage of router-on-a-stick? Options: No VLAN tagging; Requires multiple router interfaces; Requires more physical interfaces; Does not scale well beyond 50 VLANs

Does not scale well beyond 50 VLANs

Meaning of number 10 in encapsulation dot1Q 10 native? Options: Interface number; Subnet number; Subinterface number; VLAN ID

VLAN ID

Purpose of no switchport on an interface connected to another switch? Options: Create SVI; Provide access link; Provide static trunk; Create routed port

Create routed port

Purpose of command: interface gi0/1; no switchport? Options: Enable SVI; Enable BVI; Shutdown port; Make routed port

Make routed port

Operational mode for switch port connecting to router for router-on-a-stick? Options: Trunk; Dynamic desirable; Dynamic auto; Access

Trunk

Which sentence describes SVI inter-VLAN routing? Options: SVI needed for each VLAN; Subinterfaces required; Encapsulation configured on SVI; Physical interface needed per VLAN

SVI needed for each VLAN

How is traffic routed between VLANs on multilayer switch? Options: Broadcast; Subinterfaces; Internal VLAN interfaces; Physical interfaces

Internal VLAN interfaces

What is required for router-on-a-stick? Options: L2 switch with multiple trunks; Multilayer switch; Router with multiple subinterfaces; Router with multiple physical interfaces

Router with multiple subinterfaces

Which two commands help troubleshoot router-on-a-stick VLAN subinterface issues? Options: show running-config; show ip protocols; show controllers; show vlan; show ip interface

show running-config; show ip interface