GRETTA MARCHELLA ROSELINNY
1401119746
04NT
Assignment 1.2
Part A
1. How is topology related to line configuration?
Line configuration refers to connection –or the way two or more devices attached to a communication
medium-, while topology refers to how the devices connected to a link.
So, in order to know the line configuration to use, we need to know the topology that is going to be used.
(topology determines the line configuration)
2. Define the three transmission mode.
SIMPLEX
: only one of two devices can send, the other can only receive
HALF-DUPLEX : both devices can send and receive, but not simultaneously
FULL-DUPLEX : both devices can send and receive, simultaneously
Disadvantage
Advantage
Disadvantage
Advantage
3. Give an advantage and disadvantages for each type of network topology
Mesh
Star
Less traffic
Less expensive
Robust
Easy install & reconfigure
Secure
Robust
Fault identification and
Far less cabling
isolation easy
Fault identification and
isolation easy
More cabling
Difficult Install &
reconfigure
More space
Expensive
Dependency on the hub
More cabling
Bus
Easy install
Less cabling
Ring
Easy install & reconfigure
Robust
Far less cabling
Fault identification and
isolation simplified
Difficult reconnection &
fault isolation
Signal degradation
Not Robust
Noise
Unidirectional traffic
More cabling
Tree
More devices can be
attached
Allow isolate or prioritize
communication
Not Robust
Difficult Install &
reconfigure
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4. What are the advantages of a multipoint connection over a point to point connection?
Using multipoint connection is more reliable, allow fail-over, more devices in a link
5. What are some of the factors that determine whether a communication system is a LAN, MAN, or WAN?
Scope, coverage, physical structure and ownership
6. For n devices in a network what is the number of cable link required for a mesh, ring, bus and star topology?
Mesh = n(n-1)/2
Star = n
Ring = n
Bus = 1+n
Part B
1. Which topology requires a central controller or hub:
a. Mesh
b. Star
c. Bus
d. Ring
2. Which topology requires a multipoint connection?
a. Mesh
b. Star
c. Bus
d. Ring
3. Communication between a computer and a keyboard involves_________________transmission
a. Simplex
b. Half-duplex
c. Full-duplex
d. Automatic
4. A television broadcast is an example of __________________transmission.
a. Simplex
b. Half-duplex
c. Full-duplex
d. Automatic
5. A______________connection provides a dedicated link between two devices.
a. Poin to point
b. Multipoint
c. Primary
d. Secondary
6. In a______________connection, more than two devices can share a single link.
a. Poin to point
b. Multipoint
c. Primary
d. Secondary
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7. MacKenzie Publishing, with headquarter in London and branch office throughout Asia, Europe, and South
America, is probably connected by a_________________
a. LAN
b. MAN
c. WAN
d. None of the above
8. BAF Plumbing has a network consisting of two workstations and one printer. This is most probably
a________
a. LAN
b. MAN
c. WAN
d. None of the above
Part C
1. Draw a hybrid topology with a bus backbone connecting two ring backbones. Each ring backbones connect
two star networks.
Ring Backbone
Bus Backbone
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2. A network contains four computers. If there are only four lengths of cable in this network, which topology is
used and draw the network.
Ring (assuming with no hub)
Star (assuming with hub)
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