option lists inverse ARP information. Other options include
lapf, informationelements, PPP, and packet.
cbcp | compression | error |
multilink | negotiation | packet |
tasks}
negotiation, which shows the control protocol initialization, and
authentication, which shows PAP and CHAP flows.
device will try to use the same speed as another on the other end of a serial
link. However, by examining transitions between voltage states on the link,
the device can notice slight variations in the speed on each end so that it can
adjust its speed.
speaking, both sides agree to the same speed, but there is no check or
adjustment of the rates if they are slightly different. However, because only 1
byte per transfer is sent, slight differences in clock speed are not an issue.
A start bit is used to signal the beginning of a byte.
using synchronous links.
as an interface to the telephone company in the United States. Routers
typically use a short cable from a serial interface to a DSU/CSU, which is
attached to the line from the telco with a similar configuration at the other
router on the other end of the link. The routers use their attached DSU/CSU
as the clock source.
Each pair is used to send in one direction, so a 4-wire circuit allows full-
duplex communication.
pair is used to send in only one direction at a time, so a 2-wire circuit allows
only half-duplex communication.