CCNA 200-301 exam/181 questions
and answers
What is the primary purpose of a VLAN? - -To create a broadcast domain;
enable segmentation or isolation of broadcast traffic
-Unassigned Cisco switch ports remain in which VLAN? - -VLAN 1
-Do VLANs prevent broadcast storms? - -No, they minimize the size and
effect of the broadcast storm on neighbor switches and hosts
-What are four advantages to using VLANs? - -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? - -FFFF.FFFF.FFFF
-What is the Layer 3 Broadcast Destination Address? - -255.255.255.255
-What is VLAN 1 used for and can it be deleted? - -Management Traffic; it
cannot be deleted
-What is the normal VLAN range? - -VLAN 2 - 1001
-What is the extended VLAN range? - -VLAN 1006 - 4094
-What VLANs are auto-created and cannot be deleted? - -VLAN 1, 1002 -
1005
-What VLANs cannot be pruned from a trunk? - -VLAN 1006 - 4094
-How many VLANs can be assigned to a switch access port? - -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? - -interface <interface#/#>
switchport mode access
switchport access vlan #
switchport voice vlan #
, -Where is the switch VLAN configuration stored? - -vlan.dat file
-What commands would you use to globally create and name a VLAN? - -
vlan #
name <name_of_vlan>
-What is the default switch port mode? - -Access port
-What will switch access ports do with am Ethernet frame it receives with an
802.1q tag? - -It will discard the packet without learning the source MAC
address
-What command would you use to configure a range of switch ports? - -
interface range gigabitethernet#/# - #
-What command lists all VLANs configured on a switch? - -show vlan or
show vlan brief
-What command is used to display the switch ports assigned to a single
VLAN? - -show vlan id <vlan>
-When are data messages forwarded to the default gateway? - -When the
destination subnet is on a different subnet than the endpoint
-Does the Cisco default switch configuration have an IP default gateway? - -
No
-What command is used to create an IP default gateway? - -ip default-
gateway <ip_address>
-What is the primary purpose of a switch? - -To make forwarding decisions
based on destination MAC address
-List the network services provided by switches - -- 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? - -Carrier Sense Multiple Access Collision Detection (CSMA/CD)
-How many separate MAC address table does a switch create? - -A switch
creates a separate MAC address table for each configured VLAN
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