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NTC 360 Answers to Week 4 Assignments - By Instructor

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Use short answers to explain the difference (including the advantages and disadvantages of)
between:
Topologies
Mesh – Created using point-to-point connections with multiple paths between any two
nodes on a network (two variations – partial and full)
· Advantages
· Increases networks fault tolerance
· Transmits from one node to all nodes at the same time
· Disadvantages
· Impractical because the number of connection increases with every new mode
added
· Redundant network connections
Bus – Trunk cable with terminators on each end and nodes offshoot from the truck via
drop cables. Signal travels from one node to all others on the bus.
· Advantages
· Easy to implement and manage
· Best suited for small networks
· Requires less cable than star network
· Disadvantages
· Cable length limitations can limit number of connections
· Best performance with limited number of nodes
· Can be difficult to isolate cabling issues
· Interruption in bus prevents signal from transmitting down the line
Ring – Nodes connect to each other to form the network, the signal travels in one
direction around the ring passing the signal from one node to the next until it reaches its
destination.
· Advantages
· Requires careful planning to create a continuous ring
· Disadvantages
· Isolating issues when troubleshooting problems in ring
· Problem in ring prevents signal from transmitting along the ring to other nodes
Star – Uses hub or switch to centrally locate all network connections – most popular for
LAN topology today
· Advantages
· Connections are centrally located
· Easier to troubleshoot and reconfigure
· Disadvantages
· Requires the most cable among all topologies – every node has its own cable
· Hub failure means entire network is down
Protocols
Ethernet – A small piece of hardware or technology used for Local Area Network (LAN)
· Advantages
· Inexpensive
· Works with star and bus topology

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