What is also called&...

单项选择题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

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1.单项选择题Which protocol and port have been assigned by IANA for RADIUS authentication？（）

A.UDP/1812
B.UDP/1813
C.TCP/1812
D.TCP/1813

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2.单项选择题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.

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3.多项选择题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.

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4.单项选择题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

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5.多项选择题Which three protocols or applications should be placed in a class that is configured with WRED？（）

A.HTTP
B.RTP
C.streaming video
D.BitTorrent
E.POP3

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6.单项选择题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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7.单项选择题What is true about Unicast RPF in strict mode？（）

A.It works well with a multihomed environment.
B.It will inspect IP packets that are encapsulated in tunnels， such as GRE，LT2P，or PPTP.
C.uRPF is performed within the CEF switching path.
D.There might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.

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8.单项选择题 On the basis of the network provided in the exhibit， all routers are configured to run EIGRP on all links. If the link between PG-R1 and PG-R2 fails， what is the maximum number of queries PG-R3 will receive for 192.168.1.0/24， assuming that all the packets sent during convergence are transmitted once （there are no dropped or retransmitted packets）？（）

A. PG-R3 will receive up to four queries for 192.168.1.0/24， one each from PG-R2， PG-R4， PGR5，and PG-R6.
B. PG-R3 will receive up eight queries for 192.168.1.0/24， one from PG-R2， two from PG-R4，three from PG-R5， and four from PG-R6.
C. PG-R3 will receive one query for 192.168.1.0/24， since the remote routers， PG-R4， PG-R5， and PG-R6， are natural stubs in EIGRP.
D. PG-R3 will not receive any queries from PG-R2， because there are no alternate paths for 192.168.1.0/24.

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9.多项选择题Which two statements about SA caching are true？（）

A.Caching allows pacing of MSDP messages.
B.Caching reduces join latency.
C.Caching should not be done by an MSDP speaker.
D.Caching is used to update the BGP MDT address family.

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10.多项选择题Which two are differences between IGMPv2 and IGMPv3 reports？（）

A.IGMPv3 has the ability to include or exclude source lists.
B.All IGMPv3 hosts send reports to destination address 224.0.0.22.
C.Only IGMPv2 reports may contain multiple group state records.
D.All IGMPv3 hosts send reports to destination address 224.0.0.23.
E.IGMPv2 does not support the Leave Group message.

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