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

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

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

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

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

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