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Satellite Radio Channels
A communication satellite links two or more earth microwave transmitter receiver, know as ground stations. The satellite receives transmission on one frequency band,
Regenerates the signal a repeater and transmits the signal on another frequency. Satellites can provide transmission rates in the gigabits per second range. Two types of satellites are used in communication geostationary satellites and low altitude satellites.
Geostationary satellite permanently remain above the same spot on earth. This stationary presence is achieved by placing he satellite in orbit at 36,000kilometers above earth surface. This huge distance from ground station through satellite back to ground stations introduces a substantial signal propagation delay of 250 milliseconds. Nevertheless satellite links which can operate at the speeds of hundreds of Mbps are often used in telephone networks and is the backbone of the internet.
Low altitude satellites are placed much closer to earth and do not remain permanently above one spot on earth. They rotate around earth just as the moon does.
To provide continuous coverage to an area many satellites need to be placed orbit. Low altitude satellite technology may be used be used for internet access sometimes in the future.
TCP creates a reliable data transfer service, in addition to IP''s unreliable best-effort service. Study the related sections of the text, and in your own words, summarize how TCP
Q. Describe Flow and Error Control Mechanisms? Flow and Error Control Mechanisms - Stop and Wait ARQ - Go-Back ARQ - Selective Repeat ARQ
Packet Cost Both distance vector and link state routing are lowest algorithms. Tow factors govern how cost is applied to packets in determines a route. Cost is a
Process Switching It applies the brute force method to switch packets wih consumption of large amount of CPU time List of items are needed when switching packets Routing
Split Horizon - If you attain a protocol's route on an interface, do not send information about that route back out that interface.
What is DoS? A do, or Denial-of-Service attack, is an attempt to stop users from being able to access the internet or any other network services. Such attacks might be come in
The steps of forwarding the packets of information is known routing. The information about receivers is saved in routing tables. Note that several entries have same next hop. It is
Prepare the Network Step 1: Disable all ports by using the shutdown command. Ensure that the initial switch port states are inactive with the shutdown command. Use the inter
Interconnection Network An interconnection network is designed for transferring data between two processors in a Multi-stage network. Memory bottleneck is a fundamental limitat
Bootp protocol normally use it in dhcp protocol, it is configured manually in order to give ip add or there relvent host. Rarp is a work just opposite of Arp. Rarp stand for rev
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