Z3dx7x Vol 1 Unit 5
.
- 1.The design of communications network is known as
- A.
An internet suite
- B.
The physical layer
- C.
Network architecture
- D.
Network implementation
- 2.
- What kind of network is a group of computers and associated devices that share a common communications line within a small geographic area?
- A.
MAN
- B.
VPN
- C.
LAN
- D.
WAN
- What kind of network is a group of computers and associated devices that share a common communications line within a small geographic area?
- 3.What kind of network interconnects users with computer resources in a geographic area or region like a city?
- A.
LAN
- B.
WAB
- C.
VPN
- D.
MAN
- 4.Which 802.11 standard has a throughput of 11 Mbps and runs at the 2.4 GHz frequency?
- A.
802.11a
- B.
802.11b
- C.
802.11g
- D.
802.11n
- 5.Which 802.11 standard is designed to operate at both 2.4 GHz and 5 GHz?
- A.
802.11a
- B.
802.11b
- C.
802.11g
- D.
802.11n
- 6.What topology defines the layout of a network's devices and media?
- A.
Physical
- B.
Logical
- C.
Hybrid
- D.
Star
- 7.What topology consists of cable segments from each computer connected to a centralized component?
- A.
Bus
- B.
Star
- C.
Ring
- D.
Hybrid
- 8.Over a single pair cable, Integrated Services Digital Network (ISDN) is capable of transmission rates of
- A.
256 Kbps
- B.
256 Mbps
- C.
144 Mbps
- D.
144 Kbps
- 9.A modem is a device that
- A.
Modulates and demodulates data signals
- B.
Uses algorithms to determine optimal path to end destination.
- C.
Transmits on every link attached to it.
- D.
Operates on the Network layer of the Open Systems Interconnection (OSI) model
- 10.What Data Link Layer network device logically separates a single network into two segments or collision domains in Ethernet networks?
- A.
Hub
- B.
Bridge
- C.
Switch
- D.
Router
- 11.Two basic routing activities are determining optimal routing paths and
- A.
Modulation of datagrams through an internetwork.
- B.
Layer-1 error determination and correction through an internetwork .
- C.
Virtual Private Network (VPN) tunnel determination through an internetwork .
- D.
transporting information groups (packets) through an internetwork
- 12.Dynamic routing automatically calculates the best path between how many nodes?
- A.
2
- B.
3
- C.
4
- D.
5
- 13.What type of encryption is applied to each end of a communications line in a distributed network, and ensures all information flowing is unintelligible to an unauthorized intruder?
- A.
Line encryption.
- B.
Link encryption.
- C.
Device encryption.
- D.
End-to-end encryption
- 14.Which type of cable is associated with the original designs of the Ethernet standard?
- A.
Coaxial cable.
- B.
Fiber optic cable.
- C.
Shielded twisted-pair (STP).
- D.
Unshielded twisted-pair (UTP).
- 15.Which transmission medium is the primary carrier of voice communications?
- A.
Twisted pair cable.
- B.
Fiber optic cable.
- C.
Coaxial cable.
- D.
Twinax cable
- 16.What is the most common wireless networking standard?
- A.
802.3
- B.
802.9
- C.
802.11
- D.
802.14
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