Section 9. Establishing Serial Point-to-Point Connections
WANs connect networks, users, and services across a broad geographic area. Companies use the WAN to connect company sites for information exchange (see Figure 9-1).
Figure 9-1. WAN Connections
Understanding Serial WAN Interfaces
WAN serial interfaces, defined as follows, are either synchronous or asynchronous:
• Synchronous links have identical frequencies and contain individual characters encapsulated in control bits, called start/stop bits, which designate the beginning and end of each character. Synchronous links try to use the same speed as the other end of a serial link. Synchronous ...
Get CCNA Quick Reference Sheets (CCNA Exam 640-802) now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
