CCNA 200-301 Question and Answers

What is the primary purpose of a VLAN? - ANSWER-To create a broadcast domain;
enable segmentation or isolation of broadcast traffic

Unassigned Cisco switch ports remain in which VLAN? - ANSWER-VLAN 1

Do VLANs prevent broadcast storms? - ANSWER-No, they minimize the size and effect
of the broadcast storm on neighbor switches and hosts

What are four advantages to using VLANs? - ANSWER-1. Enable access to network
services based on logical requirements
2. Network security is optimized with VLANs that enable managing and filtering
sensitive traffic from other network traffic
3. Bandwidth efficiency is accomplished through segmenting traffic into smaller
broadcast domains
4. Easier add/move/delete administration of endpoints on a network and scalability for
larger enterprise deployments

What is the Layer 2 Broadcast Destination Address? - ANSWER-FFFF.FFFF.FFFF

What is the Layer 3 Broadcast Destination Address? - ANSWER-255.255.255.255

What is VLAN 1 used for and can it be deleted? - ANSWER-Management Traffic; it
cannot be deleted

What is the normal VLAN range? - ANSWER-VLAN 2 - 1001

What is the extended VLAN range? - ANSWER-VLAN 1006 - 4094

What VLANs are auto-created and cannot be deleted? - ANSWER-VLAN 1, 1002 -
1005

What VLANs cannot be pruned from a trunk? - ANSWER-VLAN 1006 - 4094

How many VLANs can be assigned to a switch access port? - ANSWER-Only one
VLAN unless you are connecting an IP phone

What commands would you use to setup a switch access port with an IP phone? -
ANSWER-interface <interface#/#>
switchport mode access
switchport access vlan #
switchport voice vlan #

Where is the switch VLAN configuration stored? - ANSWER-vlan.dat file

What commands would you use to globally create and name a VLAN? - ANSWER-vlan
#

, name <name_of_vlan>

What is the default switch port mode? - ANSWER-Access port

What will switch access ports do with am Ethernet frame it receives with an 802.1q tag?
- ANSWER-It will discard the packet without learning the source MAC address

What command would you use to configure a range of switch ports? - ANSWER-
interface range gigabitethernet#/# - #

What command lists all VLANs configured on a switch? - ANSWER-show vlan or show
vlan brief

What command is used to display the switch ports assigned to a single VLAN? -
ANSWER-show vlan id <vlan>

When are data messages forwarded to the default gateway? - ANSWER-When the
destination subnet is on a different subnet than the endpoint

Does the Cisco default switch configuration have an IP default gateway? - ANSWER-No

What command is used to create an IP default gateway? - ANSWER-ip default-gateway
<ip_address>

What is the primary purpose of a switch? - ANSWER-To make forwarding decisions
based on destination MAC address

List the network services provided by switches - ANSWER-- Only read Ethernet frame
headers and forward traffic
- Create and maintain the MAC address table
- Create separate collision domains per switch port
- Create separate broadcast domains per VLAN

What method was used for detecting Ethernet collisions on older hubs and bridges? -
ANSWER-Carrier Sense Multiple Access Collision Detection (CSMA/CD)

How many separate MAC address table does a switch create? - ANSWER-A switch
creates a separate MAC address table for each configured VLAN

What command lists the contents of the MAC address table for a switch? - ANSWER-
show mac address-table

When does a switch begin MAC address learning? - ANSWER-When a switch is first
started and connected hosts start sending frames? Also triggered when the aging time
expires for an address