多项选择题The OSPF hello protocol performs which of the following tasks?()

A. It provides dynamic neighbor discovery
B. It detects unreachable neighbors in 90 second intervals
C. It maintains neighbor relationships
D. It negotiates correctness parameters between neighboring interfaces
E. It uses timers to elect the router witch the fastest links as the designated router
F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF


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1.多项选择题Which of the following describe private IP addresses?()

A.addresseschosenbyacompanytocommunicatewiththeInternet
B.addressesthatcannotberoutedthroughthepublicInternet
C.addressesthatcanberoutedthroughthepublicInternet
D.aschemetoconservepublicaddresses
E.addresseslicensedtoenterprisesorISPsbyanInternetregistryorganization


2.多项选择题Which three statements about VTP features are true?()

A. When properly configured,VTP minimizes VLAN misconfigurations and configuration inconsistencies
B. Each broadcast domain on a switch can have its own unique VTP domain
C. VTP works at Layer 3 of the OSI model and requires that a management VLAN IP address be configured.
D. When properly configured,VTP maintains VLAN configuration consistency and accelerates trunk link negotiation.
E. VTP pruning is used to increase available bandwidth in trunk links
F. Client,server,and transparent are valid VTP modes
G. To configure a switch to be part of two VTP domains,each domain must have its own passwords

3.多项选择题Two switches are connected through a trunk link.which two commands show that there is a native VLAN mismatch on that link?()

A. show interfaces interface
B. show vlan bri
C. show interfaces interface switchport
D. show interface interface trunk
E. show interfaces vlan

4.多项选择题Which three are characteristics of an IPV6 anycast address?()

A. any-to-many communication model
B. delivery of packets to the group interface that is closest to the sending device
C. one-to-many communication model
D. the same address for multiple devices in the group
E. one-to-nearest communication model
F. a unique IPV6 address for each device in the group

5.多项选择题Which two data intergrity algorithms are commonly used in VPN solutions?()

A.HMAC-MD5
B.RSA
C.HMAC-SHA-1
D.DH1
E.DH2

6.多项选择题Which are three reasons that an organization with multiple branch offices and roaming users might implement a Cisco VPN solution instead of point-to-point WAN links?()

A.reduced cost
B.bette rthroughput
C.increased security
D.scalability
E.reduced latency
F.broadband incompatibility

7.多项选择题Which three statements about EIGRP are true?()

A. EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.
B. EIGRP uses a hello protocol to establish neighbor relationships
C. EIGRP uses split horizon and reverse poisoning to avoid routing loops.
D. EIGRP uses periodic updates to exchange routing information
E. EIGRP allows routers of different manufacturers to interoperate
F. EIGRP supports VLSM and authentication for routing updates.
G. EIGRP use a broadcast address to send routing information.

8.多项选择题Which two statements about using the CHAP authentication mechanism in a PPP link are true?()

A. CHAP uses a two-way handshake
B. CHAP authentication periodically occurs after link establishment
C. CHAP has no protection from playback attacks
D. CHAP authentication is performed only upon link establishment
E. CHAP uses a three-way handshake
F. CHAP authentication passwords are sent in plaintext

9.多项选择题the network administrator has been asked to give reasons for moving from ipv4 to ipv6. what are two valid reasons for adopting ipv6 over ipv4?()

A. telnet access does not require a password
B. nat
C. no broadcast
D. chanage of destination address in the ipv6 header
E. chanage of source address in the ipv6 header
F. autoconfiguration

10.多项选择题Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme.()

A. statically map IPV4 address to IPV6 addresses
B. configuration IPv4 tunnels between IPV6 islands
C. use DHCPv6 to map IPV4 addresses to IPV6 addresses
D. use proxying and translation to translate IPV6 packets into IPV4 packets
E. configure IPV6 directly
F. enable dual-stack routing

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At which layer of the OSI model dose PPP perform?()

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Which address is the IPV6 all-RIP-routers muticast group address that is used by RIPng as the destaion address?()

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Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?()

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Which cisco ios command can help to determine the timing of various debug events,relative to each other,when you are debugging a complicated router issue?()

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