单选题What is the functionality of L2TP in a BRAS environment?（）AIt tunnels DHCP requests to the LNS.BIt provides access for analog modem users.CIt provides RFC 2547 VPN services to the user.DIt tunnels a PPP session across an IP backbone.
单选题
What is the functionality of L2TP in a BRAS environment?（）
A
It tunnels DHCP requests to the LNS.
B
It provides access for analog modem users.
C
It provides RFC 2547 VPN services to the user.
D
It tunnels a PPP session across an IP backbone.
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单选题What is true about Unicast RPF in strict mode？（）AIt works well with a multihomed environment.BIt will inspect IP packets that are encapsulated in tunnels， such as GRE，LT2P，or PPTP.CuRPF is performed within the CEF switching path.DThere might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.
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