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56.
A physical star topology consists of several workstations that branch off a central device
called a __________________ .
- A.NIC
- B.Bridge
- C.Router
- D.Hub
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| At the center of a star topology is a hub or a switch. A NIC is a network card, which each computer must have to be on the network. Bridges and routers are higher-level connectivity devices that connect network segments or networks together. |
57.
Of all network cabling options, ___________________ offers the longest possible segment length.
- A.Unshielded twisted-pair
- B.Coaxial
- C.Fiber-optic
- D.Shielded twisted-pair
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Fiber-optic cable can span distances of several kilometers because it has much lower attenuation, crosstalk, and interference in comparison to copper cables. |
58.
What devices transfer packets across multiple networks and use tables to store network
addresses to determine the best destination?
- A.Routers
- B.Bridges
- C.Hubs
- D.Switches
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Routers are designed to route (transfer) packets across networks. They are able to do this routing, and determine the best path to take, based on internal routing tables they maintain. |
59.
In which network design do users access resources from other workstations rather than
from a central location?
- A.Client-server
- B.Star
- C.Ring
- D.Peer-to-peer
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| A peer-to-peer network has no servers, so all of the resources are shared from the various workstations on which they reside. This is the opposite of a client-server network, in which the majority of resources are located on servers that are dedicated to responding to client requests. |
60.
Which of the following wireless communication standards is often described in terms of a
wireless personal area network?
- A.Bluetooth
- B.Infrared
- C.Cellular
- D.Ethernet
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Bluetooth networks are often called wireless personal area networks (WPANs). |
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