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单选题
What is a key benefit of using a GRE tunnel to provide connectivity bet ween branch offices and headquarters?（）
A
authentication, integrity checking, and confidentiality
B
less overhead
C
dynamic routing over the tunnel
D
granular QoS support
E
open standard
F
scalability
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Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network.Which of the following answers best describes the router‘s logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）A. When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interfaceB. When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC. When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD. When permitted by an ACL that was referenced in the associated crypto map
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What is a key benefit of using a GRE tunnel to provide connectivity bet ween branch offices and headquarters?()
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What are the default values for GRE tunnel keeplive time and number of retries？（）A、5 seconds and 3 retriesB、10 seconds and 5 retriesC、10 seconds and 3 retriesD、20 seconds and 5 retriesE、5 seconds and 5 retries
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When configuring a multipoint GRE （mGRE） tunnel interface， which one of the following is NOT a valid configuration option：（）A、 tunnel sourceB、 tunnel destinationC、 tunnel keyD、 ip addressE、 tunnelvrf
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Which two mechanisms can be used to detect IPsec GRE tunnel failures？（）A、Dead Peer Detection （DPD）B、CDPC、isakmp keepalivesD、GRE keepalive mechanismE、The hello mechanism of the routing protocol across the IPsec tunnel
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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 numberB、The IPSEC mode （tunnel or transport）C、The GRE tunnel interface IP addressD、The GRE tunnel source interface or IP address， and tunnel destination IP addressE、The MTU size of the GRE tunnel interface
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To securely transport EIGRP traffic， a network administrator will build VPNs between sites. Whatis the best method to accomplish the transport of EIGRP traffic？（）A、 IPSec in tunnel modeB、 IPSec in transport modeC、 GRE with IPSec in transport modeD、 GRE with IPSec in tunnel mode
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在GRE Tunnel接口视图下，配置隧道封装模式为GRE的完整命令为（）。A、tunnel protocol greB、tunnel greC、tunnel-protocol greD、protocol gre
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What is a key benefit of using a GRE tunnel to provide connectivity bet ween branch offices and headquarters?（）A、authentication, integrity checking, and confidentialityB、less overheadC、dynamic routing over the tunnelD、granular QoS supportE、open standardF、scalability
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To securely transport EIGRP traffic, a network administrator will build VPNs between sites. What is the best method to accomplish the transport of EIGRP traffic?（）A、IPSec in tunnel modeB、IPSec in transport modeC、GRE with IPSec in transport modeD、GRE with IPSec in tunnel mode
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What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）A、 4 bytes for bothB、 4 bytes， and 8 bytes respectivelyC、 8 bytes for bothD、 24 bytes for both
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多选题Which three features are benefits of using GRE tunnels in conjunction with IPsec for building site-to-site VPNs？（）Aallows dynamic routing over the tunnelBsupports multi-protocol （non-IP） traffic over the tunnelCreduces IPsec headers overhead since tunnel mode is usedDsimplifies the ACL used in the crypto mapEuses Virtual Tunnel Interface （VTI） to simplify the IPsec VPN configuration
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多选题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？（）AThe crypto ACL numberBThe IPSEC mode （tunnel or transport）CThe GRE tunnel interface IP addressDThe GRE tunnel source interface or IP address， and tunnel destination IP addressEThe MTU size of the GRE tunnel interface
考题
单选题When configuring a multipoint GRE （mGRE） tunnel interface， which one of the following is NOT a valid configuration option：（）A
tunnel sourceB
tunnel destinationC
tunnel keyD
ip addressE
tunnelvrf
考题
单选题Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network. Which of the following answers best describes the router's logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）A
When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interfaceB
When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC
When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD
When permitted by an ACL that was referenced in the associated crypto map
考题
单选题What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）A
4 bytes for bothB
4 bytes， and 8 bytes respectivelyC
8 bytes for bothD
24 bytes for both
考题
单选题In which tunnel-less VPN topology do group members register with a key server in order to receivethe security association necessary to communicate with the group？（）A
Easy VPNB
GRE tunnelingC
Virtual Tunnel InterfacesD
Dynamic Multipoint VPNE
Group Encrypted Transport VPN
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