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- Light source is LED (light-emitting diode) or a laser
- LEDs are cheaper however not as precise (unfocused) limited to short-distance use
- Lasers is able to have a narrow range and better control over angle
- Receiving device requires a photosensitive cell (photodiode) capable of receiving the signal
- Utilizes SC- Subscriber channel & ST-straight tip connectors
Advantages There are times when using packet filters makes sense. If the connections require high throughput or the protocols has proprietary technology that makes it
Question 1 Explain the different activities carried out on E-Commerce, with appropriate examples Question 2 Explain the core components of E-Commerce in detail with appropria
Simplicity The advantage of this approach is the simplicity of receiver buffering. The receiver need not buffer out of order packets the sender must maintain the upper an
What are firewalls? Firewalls serve to protect an internal network from external attacks. These external threats can be hackers who need to steal data or computer viruses that
With an object server, the Client/Server application is taken as a set of communicating objects. Client object commune with server objects using an Object Request Broker (ORB). The
Problem: (a) Explain how TCP handles connection-setup management. (b) Each host on the Internet is currently assigned an IP address 32 bits long (IPv4). IPv4 addresses are u
Q. Explain Stop--and--Wait automatic repeat request? 1. Numbering frames prevents the retaining off duplicate frames. 2. Numbered acknowledgement are needed in case of delay
Internet Backbone Internet backbone is the physical networks ( usually relying on fiber optic cable ) that carries internet traffic between different networks and i
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A UDP header does not have Sequence number and Acknowledgement number fields. Is it an advantage or a disadvantage? Explain your answer in detail. User Datagram Protocol Th
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