14 - VLANs Part 2 Flashcards
802.1Q tag: The […] field identifies the VLAN the frame belongs to.
VID
802.1Q tag: The […] field indicates that a frame can be dropped if the network is congested.
DEI
802.1Q tag: The […] field is use for Class of Service.
PCP
802.1Q tag: The DEI field is […] in length.
1 bit
802.1Q tag: The PCP field is […] bits in length.
3
802.1Q tag: The TPID field is […] bits in length.
16
802.1Q tag: The TPID field is alway set to a value of […]
0x8100
802.1Q tag: What does DEI stand for?
Drop Eligible Indicator
802.1Q tag: What does PCP stand for?
Priority Code Point
802.1Q tag: What does TPID stand for?
Tag Protocol Identifier
802.1Q tag: What does VID stand for?
VLAN ID
Configure the allowed VLANs on a trunk port:
SW1(config-if)# […]
switchport trunk allowed vlan <allowed-vlans></allowed-vlans>
Configure the encapsulation type on a trunk port:
SW1(config-if)# […]
switchport trunk encapsulation <encapsulation-type></encapsulation-type>
Configure the interface as a trunk port:
SW1(config-if)# […]
switchport mode trunk
Configure the native VLAN on a trunk port:
SW1(config-if)# […]
switchport trunk native vlan <vlan-number></vlan-number>
Configure the VLAN number on a router subinterface:
R1(config-subif)# […]
encapsulation dot1q vlan-number
Display all trunk ports on the switch:
SW1# […]
show interfaces trunk
For security purposes, it is best to change the native VLAN to an […] VLAN.
unused
ROAS involves configuring VLAN tags and IP addresses on router […].
subinterfaces
The 802.1Q tag is […] bytes in length.
4
The 802.1Q tag is inserted after the […] field of the Ethernet header.
Source MAC Address
The default native VLAN is VLAN […] on all trunk ports.
1
The Extended VLAN range is […] to […]
1006 to 4094
The Normal VLAN range is […] to […]
1 to 1005
The range of usable VLANs is […] to […]
1 to 4094
The switch does not add an 802.1Q tag to frames in the […] VLAN over a trunk link.
native
VLANs […] and […] are reserved and cannot be used.
0 / 4095
VLANs: […] ports are known as ‘tagged’ ports.
trunk
VLANs: […] ports are known as ‘untagged’ ports.
Access
VLANs: Switches will tag frames sent out of […] ports with a VLAN number.
trunk
What is a Cisco proprietary VLAN trunking protocol?
ISL (Inter-Switch Link)
What is an industry standard VLAN trunking protocol?
IEEE 802.1Q (dot1q)
When a switch receives an untagged frame on a trunk port, it assumes the frame belongs to the […] VLAN.
native
