What are the major advantages and disadvantages of satellite communications?
The satellite-connect line-handler process implements the satellite-efficient version of the HDLC protocol, HDLC Extended Mode. HDLC Extended Mode allows a maximum window size of 61 frames (the maximum window size is the number of outstanding frames that can be sent before an acknowledgment is required) and implements the selective-reject feature. Selective reject causes only frames that arrive in error to be retransmitted. The major benefits of satellite connections are Price-to-performance ratio. Satellite channels can add a large amount of transmission capacity, significantly reducing the cost of long-distance communications. Fault-tolerance. You can use the multiline path feature to enhance the reliability of satellite connections. Using this feature, you can configure up to eight parallel lines between nodes. The major disadvantage of satellite connections is potentially long propagation delays (approximately 240 mlliseconds) when sending data to the satellite and then to the dest
