Which ISDN device converts the four-wire BRI signals from an S/T interface into two-wire signals of a U interface?（）

单项选择题Which WAN protocol is used for out-of-band signaling?（）

A.NCP
B.HDLC
C.LAPB
D.LAPD

单项选择题Inverse ARP is being used in the TestKing frame relay network. What is the purpose of Inverse ARP?（）

A. To ma a known IP address to a MAC address
B. To map a known DLCI to a MAC address
C. To ma a known MAC address to an IP address
D. To ma a known DLCI address to a IP address
E. To ma a known IP address to a SPID address
F. To ma a known SPID address to a MAC address

多项选择题WAN data link encapsulation types include which of the following?（）

A. T1
B. Frame Relay
C. DSL
D. PPP
E. ISDN
F. IPX

多项选择题Which of the following commands would be applied to a WAN interface, but not on LAN Interface?（）

A. IP address
B. encapsulation PPP
C. no shutdown
D. PPP authentication CHAP
E. Speed
F. None of the above

多项选择题Which of the following statements correctly describes the characteristics of a Frame Relay point-to-point subinterface?（）

A. Needs to use Inverse ARP.
B. Maps a single IP subnet per DLCI.
C. Maps a single IP subnet across multiple DLCIs.
D. Resolves NBMA (non broadcast multi access) split horizon issues.
E. Requires use of the frame-relay map command.
F. None of the above