Which of the following technologies has been developed to support TCP/IP networking over low-speed serial interfaces?
Correct Answer: B
Explanation/Reference:
Explanation:
Serial Line Internet Protocol (SLIP) is an older technology developed to support TCP/IP communications over asynchronous serial connections, such as serial cables or modem dial - up.
Incorrect Answers:
A: ISDN can be considered a suite of digital services existing on layers 1, 2, and 3 of the OSI model. ISDN is digital, not serial.
C: xDSL is a digital technology. xDSL is the term for the Broadband Access technologies based on Digital Subscriber Line (DSL) technology
D: The T1 carrier is the most commonly used digital, not serial, transmission service.
References:
Stewart, James M., Ed Tittel, and Mike Chapple, CISSP: Certified Information Systems Security Professional Study Guide, 5th Edition, Sybex, Indianapolis, 2011, p. 138