A.host routeB.default routeC.customer networkD.ISP’s ro……

单项选择题How does the ERX Edge Router interact with subscriber IP addresses assigned by an externa lDHCP server?（）

A.It monitors messages from the external server and updates the routing table as needed.
B.It maintains the leases for the DHCP server and reassigns addresses to new subscribers.
C.It sends keepalives to the subscriber and makes the address available when the subscriber stops responding.
D.It sends keepalives to the subscriber and removes the host route when the subscriber stops responding.

单项选择题In a Routed 1483 network which method of routing is typically employed on the DSL router？（）

A.static
B.OSPF
C.RIPv1
D.RIPv2

多项选择题A Bridged 1483 service offering is grouping DSL users into a large subnet.What are three characteristics of this configuration?（）

A.It burns IP addresses.
B.It conserves IP addresses.
C.A group of PVCs is asubnet.
D.It provides a numbered IP address to the ERX.
E.It provides an IP unnumber edaddress to ERX.

单项选择题How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network？（）

A.It maintains DHCP leases on behalf of subscribers.
B.It initiates DHCP requests on behalf of subscribers.
C.It passes DHCP traffic to and from the server;you must configure static host routes.
D.It passes DHCP traffic to and from the server and inserts host routes into its routing table.

单项选择题A service provider is operating a Routed 1483 network where the ATM PVCs are treated as a large subnet.What is a consequence of this configuration？（）

A.ItburnsupIPaddresses.
B.ItconservesIPaddresses.
C.Itresultsinasmallerroutingtable.
D.EachPVChasaseparate/30subnet