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Q:

What is multicast?

Answer

To send data/info to group of computers using same network

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Subject: Network Administration

Q:

What is Broadcast ?

Answer

To send data/info to all of the members of the network..( simple 176.16.255.255 for class B network)

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Subject: Network Administration

Q:

What is the difference between a Hub and a Switch?

Answer

Hub is device to connect two devices, switch is a network bridge which processes and routes data approirately over network layer of OSI Reference model

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Subject: Network Administration

Q:

What are the main advantages and disadvantages of Fiber-Optic-based networks?

Answer

Advantages : More efficient and quality of service is better.

Dis advantages: Expensive, complicated

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Subject: Network Administration

Q:

What is a MAC Address?

Answer

MAC- Media Access Control .its a unique identifier defined for certain hardware/network adapters

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Subject: Network Administration

Q:

A man goes down stream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the strean are 10km/hr and 14km/hr respectively, the distance of the destination from the string place is

A) 16 km	B) 18 km
C) 21 km	D) 25 km

Answer & Explanation Answer: C) 21 km

Explanation:

Let the distance covered be D km.

$\frac{D}{10 + 4} + \frac{D}{10 - 4} = 5$

$\frac{D}{14} + \frac{D}{6} = 5$

10D = 42 x 5 = 210

=> D = 21 km

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Filed Under: Boats and Streams
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

Two trains started at the same time, one from A to B and the other from B to A . If they arrived at B and A respectively 4 hours and 9 hours after they passed each other the ratio of the speeds of the two trains was

A) 2:1	B) 3:2
C) 4:3	D) 5:4

Answer & Explanation Answer: B) 3:2

Explanation:

Note : If two trains (or bodies) start at the same time from points A and B towards each other and after crossing they take a and b sec in reaching B and A respectively, then: (A's speed) : (B's speed) = (b : a)

Therefore, Ratio of the speeds of two trains = $\sqrt{9} : \sqrt{4}$ = 3 : 2

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Filed Under: Problems on Trains
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

Ravi started walking from his house east direction on Bus stop which is 3km.away. Then he set off in the bus straight towards his right to the school 4 km away. what is the crow flight distance from his house to the school?

A) 1 km	B) 5 km
C) 7 km	D) 12 km

Answer & Explanation Answer: B) 5 km

Explanation:

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Filed Under: Direction Sense Test

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