单项选择题
Distribution layer: This layer includes LAN-based routers and layer 3 switches . When is a first-hop redundancy protocol needed in the distribution layer?（）
A. OSPF is not supported by the design
B. HSRP is not supported by the design
C. preempt tuning of the default gateway is needed
D. the design implements Layer 3 between the access switch and the distribution switch
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单项选择题
When dealing with transparent caching, where should the Content Engines be placed?（）
A. close to the servers
B. close to the end users
C. at the Internet edge
D. in front of web server farms -
单项选择题
The VPN termination function provides the ability to connect two networks together securely over the internet. Which of these is true of IP addressing with regard to VPN termination?（）
A. termination devices need routable addresses inside the VPN
B. termination devices need not routable addresses inside the VPN
C. IGP routing protocols will update their routing tables over anIPsec VPN
D. addressing designs need to allow for summarization -
多项选择题
Acme Costume Company is connecting its manufacturing facilties to its stores with a small pointto-multipoint Frame Relay IP WAN. Little growth is expected in the network infrastructure.Up to this point the company has been using a dial-on-demand network. Dropping WAN costs, however, have led them to consider using a high-speed WAN solution to improve access. Which two routing protocols could you deploy to support the new larger network while keeping costs down?（）
A.RIP
B.RIPv2
C.EIGRP
D.OSPF
