Which two statements are TRUE of synchronous serial ports? (Choose two.)

A.
These ports can be used to provide leased-line or dial-up communications.

B.
These ports do not support the High-Level Data Link Control (HDLC) encapsulation method.

C.
An AUI connector is used with serial ports.

D.
These ports can be used to configure high-speed lines (E1 or T1).

E.
An RJ-45 connector is used with serial ports.

Explanation:
Synchronous serial ports can be used to provide leased-line or dial-up communications, and these ports can be
used to configure high-speed lines (E1 or T1). The following are also true of synchronous serial ports:
With the help of synchronous serial lines, dialers can be configured, which are then used to support dial-ondemand routing.
These ports are found on several serial network interface processors and cards.
The option stating that synchronous serial ports cannot support High-Level Data Link Control (HDLC)
encapsulation method is incorrect because HDLC is the default encapsulation method configured on serial
interfaces.
The option stating that an AUI connector is used with serial ports is incorrect because AUI is a connector used
with Ethernet ports.
The option stating that an RJ-45 connector is used with serial ports is incorrect because RJ-45 and RJ-48
connectors are used with ISDN BRI connections.
Objective:
WAN Technologies
Sub-Objective:
Describe WAN access connectivity options