Blueprint of all questions and answers for the CCNA exam 200-
301
What is a VLAN's main function? To establish a broadcast domain, broadcast traffic must be
segmented or isolated.
Which VLAN still contains unassigned Cisco switch ports? VLAN 1
Are broadcast storms avoided by VLANs? No, they lessen the broadcast storm's magnitude and
impact on nearby switches and hosts.
Which four benefits come with utilizing VLANs? 1. Make network services accessible in
accordance with logical needs
2. VLANs optimize network security by allowing important traffic to be managed and filtered out
of other network traffic.
3. By dividing traffic into smaller broadcast areas, bandwidth efficiency is achieved.
4. Scalability for bigger enterprise deployments and simpler add, move, and delete
management of network endpoints
What is the destination address for a Layer 2 broadcast? FFFF.FFFF.FFFF
A switch access port can have a maximum of how many VLANs assigned to it? Unless you are
connecting an IP phone, there can only be one VLAN.
Which commands would you use to configure an IP phone's switch access port? interface
Access to switchport mode
access to switchports Voice switchport vlan # VLAN number
Where is the VLAN configuration for the switch kept? The vlan.dat file
Which commands would you use to name and create a VLAN globally? Name is the vlan
number.
Which switch port mode is the default? Port of access
When an Ethernet transmission with an 802.1q tag is received by switch access ports, what will
happen? Without knowing the originating MAC address, it will discard the packet.
If you wanted to configure a variety of switch ports, what command would you use? range of
the interface Ethernet gigabit #/# - #
Which command lists
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
What command lists the contents of the MAC address table for a switch? show mac address-
table
When does a switch begin MAC address learning? When a switch is first started and connected
hosts start sending frames? Also triggered when the aging time expires for an address
What is the default time that a switch removes MAC address table entries? 300 seconds
How do you disable MAC address table aging? Configure the MAC aging timer to zero
What are the steps when a host sends data to a server on the same VLAN for the first time?
1. Switch adds the source MAC address of incoming frame if it is not listed in the MAC
address table
2. Switch does a MAC address table lookup for the destination MAC address
3. Switch floods a frame using FFFF.FFFF.FFFF as destination MAC address out all switch ports
except the port where the source MAC address was learned
4. Server wit the assigned MAC address responds with a frame that lists the MAC address
5. Switch updates the MAC address table with the MAC address of the server; That is the
destination MAC address for frames sent from the host
6. Switch forwards the frames from the host to the server based on the switch port assigned to
the server
What is Cut-Through Switching? It is a technique that optimizes performance by examing
only the first 6 bytes (destination MAC address) of an Ethernet frame before making a
301
What is a VLAN's main function? To establish a broadcast domain, broadcast traffic must be
segmented or isolated.
Which VLAN still contains unassigned Cisco switch ports? VLAN 1
Are broadcast storms avoided by VLANs? No, they lessen the broadcast storm's magnitude and
impact on nearby switches and hosts.
Which four benefits come with utilizing VLANs? 1. Make network services accessible in
accordance with logical needs
2. VLANs optimize network security by allowing important traffic to be managed and filtered out
of other network traffic.
3. By dividing traffic into smaller broadcast areas, bandwidth efficiency is achieved.
4. Scalability for bigger enterprise deployments and simpler add, move, and delete
management of network endpoints
What is the destination address for a Layer 2 broadcast? FFFF.FFFF.FFFF
A switch access port can have a maximum of how many VLANs assigned to it? Unless you are
connecting an IP phone, there can only be one VLAN.
Which commands would you use to configure an IP phone's switch access port? interface
Access to switchport mode
access to switchports Voice switchport vlan # VLAN number
Where is the VLAN configuration for the switch kept? The vlan.dat file
Which commands would you use to name and create a VLAN globally? Name is the vlan
number.
Which switch port mode is the default? Port of access
When an Ethernet transmission with an 802.1q tag is received by switch access ports, what will
happen? Without knowing the originating MAC address, it will discard the packet.
If you wanted to configure a variety of switch ports, what command would you use? range of
the interface Ethernet gigabit #/# - #
Which command lists
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
What command lists the contents of the MAC address table for a switch? show mac address-
table
When does a switch begin MAC address learning? When a switch is first started and connected
hosts start sending frames? Also triggered when the aging time expires for an address
What is the default time that a switch removes MAC address table entries? 300 seconds
How do you disable MAC address table aging? Configure the MAC aging timer to zero
What are the steps when a host sends data to a server on the same VLAN for the first time?
1. Switch adds the source MAC address of incoming frame if it is not listed in the MAC
address table
2. Switch does a MAC address table lookup for the destination MAC address
3. Switch floods a frame using FFFF.FFFF.FFFF as destination MAC address out all switch ports
except the port where the source MAC address was learned
4. Server wit the assigned MAC address responds with a frame that lists the MAC address
5. Switch updates the MAC address table with the MAC address of the server; That is the
destination MAC address for frames sent from the host
6. Switch forwards the frames from the host to the server based on the switch port assigned to
the server
What is Cut-Through Switching? It is a technique that optimizes performance by examing
only the first 6 bytes (destination MAC address) of an Ethernet frame before making a
