By default, the cost of an OSPF interface is calculated based on the bandwidth. The formula to calculate the cost is reference bandwidth/interface bandwidth.
A. TRUE
B. FALSE
Which of the following statements regarding VLAN configuration are true? (Choose two.)
A. You can enter the VLAN view and create a VLAN at the same time.
B. Running undoVLANinvalidates the VLAN but the VLAN still exists. You do not need to recreate the VLAN to use it.
C. You can configure a description string of VLAN. The length of the string is unlimited.
D. If the VLAN ID is not entered when running the displayVLANcommand, all information about the VLAN will be displayed.
Which bits in a VLAN tag indicates 802.1Q?
A. 0x9100
B. 0x8808
C. 0x8100
D. 0x8800
Which of the following routers have multicast routing entries even when there is no receiver on the network? (Choose two.)
A. Source's DR
B. Receiver router
C. Intermediate router
D. RP
Which of the following statements regarding IP address 224.0.0.1 are correct? (Choose two.)
A. It is a multicast IP address.
B. It is a private IP address.
C. It represents all the hosts and routers.
D. It represents all the routers.
The IGMP protocol runs between a host and its directly connected multicast router.
A. True
B. False
How many types of topology change messages are defined in RSTP?
A. 1
B. 2
C. 3
D. 4
How many bits of the multicast MAC address are used for multicast IP address mapping?
A. 24
B. 22
C. 25
D. 23
How does an IGMP router maintain group memberships on the network? (Choose two.)
A. The router maintains a timer for each group membership. If the router receives a Report message from a receiver host, it refreshes the timer of the group membership of this host; if the router does not receive any Report message from a receiver host before the timer expires, it deletes the group membership of this host.
B. The router periodically sends Query messages. After a receiver host receives the Query message, the receiver host sends a Report message.
C. A receiver host periodically sends a Report message.
D. The router deletes a group membership only when it receives a Leave message for this group.
Which of the following tools cannot be used for route filtering?
A. Filter-policy
B. IP-prefix
C. Route-policy
D. Policy-based-route
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