PPP是否有 error correction？
在TK801 V114里有这样一道题：
QUESTION NO: 4
Which of the following correctly describe characteristics of PPP? (Select all valid
answer choices)
A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.
D. Is proprietary to Cisco
E. Supports error correction.
TK给的答案是AC
PPP到底有没有Error Correction？
在Cisco Certifified Network Assoiate (640-801) Richard 著P619有这样的话：
ppp has many more features than HDLC. Like HDLC ,ppp defines a frame type and how
two ppp devices communicate with each other ,including the multiplexing of network and
data link layer protocols across the same link.However,ppp also
■ Performs dynamic configuration of links
■ Allow for authentication
■ compresses packet heads
■ tests quality of links
■ performs error detection and correction
■ Allows multiple ppp physical connections to be bound together as a single logical connection.
而且在P454的Q11的解释中也说明Finally, PPP supports error correction and the use of bonded multilink circuits
在P882的Q75，A. Provides error correction也是正确答案
多谢
