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Exercise : Virtual LANs - Virtual LANs
  • Virtual LANs - Virtual LANs
1.
Which of the following is true regarding VLANs?
You must have at least two VLANs defined in every Cisco switched network.
All VLANs are configured at the fastest switch and, by default, propagate this information to all other switches.
You should not have more than 10 switches in the same VTP domain.
VTP is used to send VLAN information to switches in a configured VTP domain.
Answer: Option
Explanation:
Switches do not propagate VLAN information by default; you must configure the VTP domain. VLAN Trunk Protocol (VTP) is used to propagate VLAN information across a trunked link.
2.
Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?
STP
VTP
DHCP
ISL
Answer: Option
Explanation:
Virtual Trunk Protocol (VTP) is used to pass a VLAN database to any or all switches in the switched network. The three VTP modes are server, client, and transparent.
3.
Which of the following is true regarding VTP?
All switches are VTP servers by default.
All switches are VTP transparent by default.
VTP is on by default with a domain name of Cisco on all Cisco switches.
All switches are VTP clients by default.
Answer: Option
Explanation:
All Cisco switches are VTP servers by default. No other VTP information is configured on a Cisco switch by default. You must set the VTP domain name on all switches to be the same domain name or they will not share the VTP database.
4.
Which of the following commands sets a trunk port on a 2960 switch?
trunk on
trunk all
switchport trunk on
switchport mode trunk
Answer: Option
Explanation:
To set a switch port to trunk mode, which allows all VLAN information to pass down the link, use the switchport mode trunk command.
5.
Which command will configure a switch port to use the IEEE standard method of inserting VLAN membership information into Ethernet frames?
Switch(config)# switchport trunk encapsulation isl
Switch(config)# switchport trunk encapsulation ietf
Switch(config)# switchport trunk encapsulation dot1q
Switch(config-if)# switchport trunk encapsulation isl
Switch(config-if)# switchport trunk encapsulation dot1q
Answer: Option
Explanation:
If you are on a 2950 switch, then the interface command is just switchport mode trunk, since the 2950 can only run the IEEE 802.1Q version. However, a 3550 can run both ISL and 802.1Q, so you must use the encapsulation command. The argument to choose 802.1Q for a trunking protocol is dot1q.
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