多項(xiàng)選擇題Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree ProtocolIEEE 802.1 D?()

A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay


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1.單項(xiàng)選擇題Spanning Tree Protocol IEEE 802.1 s defines the ability to deploy which of these?()

A.one global STP instance for all VLANs
B.one STP instance for each VLAN
C.one STP instance per set of VLANs
D.one STP instance per set of bridges

2.單項(xiàng)選擇題Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correctBGP session endpoint addresses and the correct BGP session hop-count limit EBGP multihop. What is agood first test to see if BGP will work across the firewall?()

A.Attempt to TELNET from the router connected to the inside of the firewall to the router connected to theoutside of the firewall. If telnet works, BGP will work, since telnet and BGP both use TCP to transportdata.
B.Ping from the router connected to the inside interface of the firewall to the router connected to theoutside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP totransport packets.
C.There is no way to make BGP work across a firewall without special configuration, so there is no simpletest that will show you if BGP will work or not, other than trying to start the peering session.
D.There is no way to make BGP work across a firewall.

4.單項(xiàng)選擇題What is also called Type 0 authentication in OSPF on Cisco Routers?()

A.MD5
B.There is no Type 0 authentication
C.SHA1
D.Null

6.單項(xiàng)選擇題Which of the following is true about the MPLS header and its EXP field size?()

A.The MPLS header is 2 bytes,and the EXP field is 3 bits long.
B.The MPLS header is 1 byte,and the EXP field is 3 bits long.
C.The MPLS header is 4 bytes,and the EXP field is 3 bits long.
D.The MPLS header is 3 bytes,and the EXP field is 3 bits long.

7.多項(xiàng)選擇題Which two statements are true about RED?()

A.RED randomly drops packets before the queue becomes full.
B.RED is always useful,without dependency on flow.
C.RED increases the drop rate as the average queue size increases.
D.RED has a per-flow intelligence.

8.單項(xiàng)選擇題What is the command to configure RSVP to reserve up to one-tenth of a Gigabit link,but only allow eachindividual flow to use 1 MB/s?()

A.ip rsvp bandwidth 100000 1000
B.ip rsvp bandwidth 100000 1
C.ip rsvp bandwidth 10 1
D.ip rsvp bandwidth 1000000 1000

10.單項(xiàng)選擇題In GLBP,which router will answer on client ARP requests?()

A.all active AVF routers as the first response is used by the client
B.the AVG router,replying with a different AVF MAC address each time
C.a random AVF router,based on a GLBP seed hash key
D.only the AVG router that received the ARP request first

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