Which two tunneling techniques support IPv6 multicasting？ （）

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• Which statement about the Cisco MPLS Traffic Engineering class-based tunnel selection （CBTS） is nottrue？（）

  A . Local mechanism is at the middle-point router. B . EXP selection is between multiple tunnels to the same destination C . Bundle members are configured with EXP values to carry. D . The tunnel selection is configured on the tunnel master. E . The tunnel master bundles the tunnel member

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• Which two tunneling techniques in IPv6 do not require an IPv4 tunnel destination in the configuration？（）

  A . 6to4 B . 6over4 C . ISATAP D . GRE

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• Which of the following router models will support 1000 tunnels？（）

  A . 2811 B . 2801 C . 2851 D . 2821 E . 1841 F . 3825

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• Which two tunneling techniques support IPv6 multicasting？（）

  A . 6to4 B . 6over4 C . ISATAP D . 6PE E . GRE

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• EAP-FAST provides a secure tunnel during Phase One to protect the user’s authentication credentials. Which of these entities initializes the secure tunnel？（）

  A . generic token card B . x.509 certificate C . preshared key D . Protected Access Credential

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• Which router or router combination is used to calculate the MPLS traffic engineering tunnel path？（）

  A . head-end router and tail-end router B . middle-point router C . head-end router D . tart-end router E . tail-end router

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• You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）

  A . The crypto ACL number B . The IPSEC mode （tunnel or transport） C . The GRE tunnel interface IP address D . The GRE tunnel source interface or IP address， and tunnel destination IP address E . The MTU size of the GRE tunnel interface

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• Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）

  A . Service Ethertype B . ISL C . PseudoLAN TAG D . 802.1q VLAN TAG E . Control Word F . Tunnel Label

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• Eap-fast provides a secure tunnel during phase one to protect the user’s authentication credentials. Which of these entities initializes the secure tunnel？（）

  A . x.509 certificate B . generic token card C . pre shared key D . protected access credential

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• EAP-FAST provides a secure tunnel during Phase One to protect the user’s authenticationcredentials. Which of these entities initializes the secure tunnel？（）

  A . x.509 certificate B . generic token card C . preshared key D . Protected Access Credential

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• A company is using 6to4 tunneling within their IPv6 network. Which two statements about this kindof tunneling are accurate？（）

  A . 6to4 is a manual tunnel method B . Prepending a reserved IPv6 code to the hexadecimal representation of 192.168.0.1 facilitates6to4 tunneling C . Each 6to4 site receives a /48 prefix in a 6to4 tunnel D . 2002：：/48 is the address range specifically assigned to 6to4 E . Prepending 0x2002 with the IPv4 address creates an IPv6 address that is used in 6to4tunneling

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• A Company is using 6to4 tunnels in their IPv6 network. Which two statements are true about thesetunnels？（）

  A . In a 6to4 tunnel， the first two bytes of the IPv6 address will be 0x2002 and the next four byteswill be the hexadecimal equivalent of the IPv4 address B . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the2002：1315：4463：1：：/64 IPv6 address C . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the 2002：c0a8：6301：：/48IPv6 address D . In a 6to4 tunnel， the first two bytes of the IPv6 address will be locally derived and the next twobytes will be the hexadecimal equivalent of the IPv4 address E . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the 2002：c0a8：6301：：/16IPv6 addre

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• Which two mechanisms can be used to detect IPsec GRE tunnel failures？（）

  A . Dead Peer Detection （DPD） B . CDP C . isakmp keepalives D . GRE keepalive mechanism E . The hello mechanism of the routing protocol across the IPsec tunnel

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• Which two steps below should you perform on the hub router while configuring EIGRP routing over  DMVPN （mGRE tunnel）？ （）

  A . Set the NHRP hold time to match the EIGRP hold time B . Add the enable eigrp stub command C . Add the disable eigrp as-member split-horizon command D . Add the disable eigrp as-member next-hop-self command

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• Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？（）

  A . An IPv4-compatible tunnel is a static tunnel， but an 6to4 tunnel is a semiautomatic tunnel. B . The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code. C . An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains. D . For an IPv4-compatible tunnel， the ISP assigns only IPv4 addresses for each domain， but for a 6to4 tunnel， the ISP assigns only IPv6 addresses for each domain.

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• Which of the following IPv6 tunneling mechanisms support IPv6 IGP routing protocols?（）

  A . Automatic 6to4 B . Manually configured tunnel C . ISATAP D . GRE

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• Which statement about MPLS traffic engineering policy-based tunnel selection （PBTS） is not true？（）

  A . The tunnel that is not configured with the policy-class command acts as the default B . EXP selection is between multiple tunnels to the same destination C . There is no requirement for IGP extensions D . Tunnels are configured using the policy-class command and carry multiple EXP values E . It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching

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• The answers each list a tunnel method and two consecutive IPv6 address quartets.Which answers identify a tunneling method that relies on an IPv4 address to be embedded into an IPv6 address, within the correct quartets listed?（）

  A . Automatic 6to4, quartets 2 and 3 B . Automatic 6to4, quartets 7 and 8 C . ISATAP, quartets 2 and 3 D . ISATAP, quartets 7 and 8

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• Which methods would enable traffic to be forwarded along an MPLS TE tunnel？（）

  A . MP-BGP routing B . Static routing C . Policy routing D . Autoroute E . Forwarding adjacency

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• Which statements are correct for forwarding traffic into MPLS TE tunnels？（）

  A . Autoroute causes the tunnel to be treated as a directly connected link to the head-end. B . Autoroute causes the TE head-end to establish IGP adjacency with the tail-end over the tunnel. C . Forwarding adjacency makes the TE head-end node advertise the Tunnel LSP into the IGP. D . Forwarding adjacency supports unequal cost load balancing over multiple TE tunnels.

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• Which statement is true concerning 6to4 tunneling?（）

  A . The edge routers can use any locally configured IPv6 address. B . Hosts and routers inside a 6to4 site will need a special code. C . An edge router must use IPv6 address of 2002::/16 in its prefix. D . IPv4 traffic is encapsulated with an IPv6 header.

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• In IPv6 network, an IPv6 overlay tunnel is required to communicate with isolated IPv6 networks across the existing IPv4 infrastructurE. There are currently fiv e IPv6 overlay tunnel types. Which three IPv6 overlay tunnel statements are true？（）

  A . Overlay tunnels can only be configured between border routers capable of supporting IPv4 and IPv6. B . An manual overlay tunnel supports point - to - multipo int tunnels capable of carrying IPv6 and Connectionless Network Service (CLNS) packets. C . Overlay tunneling encapsulates IPv6 packets in IPv4 packets for delivery across an IPv4 infrastructure. D . Overlay tunnels can be configured between border route rs or between a border router and a host capable of supporting IPv4 and IPv6. E . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv4 - compatible, 6to4, and Intra - Site Automatic Tunnel Addressing Protocol (ISATAP) overlay tunneling mechan isms. F . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv6 - compatible, 4to6, and Multiprotocol Label Switching (MPLS) overlay tunneling mechanisms.

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• 原文:穿山而建的铁路隧道长达数英里。译文:Railroad tunnels which are miles long built through mountains.

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• 原文:穿山而建的铁路隧道长达数英里。译文:Railroad tunnels which are miles long built through mountains.

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