Types of Network Topology
The arrangement of a network that comprises nodes and connecting lines via sender and receiver is referred to as network topology. The various network topologies are:
UGC-NET | UGC NET CS 2016 July – II | Question 27
In a fully-connected mesh network with 10 computers, total ______ number of cables are required and ______ number of ports are required for each device.
(A) 40,9
(B) 45,10
(C) 45,9
(D) 50,10
Answer: (C)
Explanation: Since each two host need a cable so n(n-1)/2 cabels needed and n – 1 number of ports are required.
i.e. 10(10 – 1) / 2 = 5 * 9 = 45 cables.
9 number of ports are required for each device.
So, option (C) is correct.
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In a fully-connected mesh network with 10 computers, total .............. number of cables are required and ................ number of ports are required for each device. (A) 40, 9 (B) 45, 10 (C) 45, 9 (D) 50, 10
How many of cable links required for the following givennetwork topology? (i) For 9 devices with mes 1 answer below »
How many of cable links required for the following givennetwork topology? (i) For 9 devices with mesh topology (ii) For 5 devices with bus topology (iii) For 7 devices with ring topology (iv) For 8 devices with star topology Attached
Computer Networks | UGC NET CS 2016 July- paper-2
In a fully-connected mesh network with 10 computers, total ______ number of cables are required and ______ number of ports are required for each device.
- 40,9
- 45,10
- 45,9
- 50,10
Answer : C
Explanation:
Total Number of cables in fully-Connected Mesh network for N computer = n *(n-1) / 2
Number of ports are required = n-1
∴Total Number of cables = 10(10 – 1) / 2 = 5 * 9 = 45 cables.
∴ Number of ports are required for each device=10-1=9
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Domain 4: Communication and Network Security (Designing and Protecting Network Security)
Eric Conrad, ... Joshua Feldman, in CISSP Study Guide (Third Edition), 2016
Star
Star topology has become the dominant physical topology for LANs. The star was first popularized by ARCNET, and later adopted by Ethernet. Each node is connected directly to a central device such as a hub or a switch, as shown in Figure 5.17.
Figure 5.17. Star Topology
Exam Warning
Remember that physical and logical topologies are related, but different. A logical ring can run via a physical ring, but there are exceptions. FDDI uses both a logical and physical ring, but Token Ring is a logical ring topology that runs on a physical star, for example. If you see the word “ring” on the exam, check the context to see if it is referring to physical ring, logical ring, or both.
Stars feature better fault tolerance: any single local cable cut or NIC failure affects one node only. Since each node is wired back to a central point, more cable is required as opposed to bus (where one cable run connects nodes to each other). This cost disadvantage is usually outweighed by the fault tolerance advantages.
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