3c251 Vol3(Set 2) Ure's
3C251 Vol3(Set 2) URE's. Comment if any or wrong.
- 1.What device is a combination transmitter/receiver in a single package?
- A.
A Transceiver
- B.
A repeater
- C.
A router
- D.
A hub
- 2.What device operates at the Physical layer of the open system interconnection (OSI) model and is used in Ethernet networks to connect which defvice to a fiber or copper cable
- A.
Transceiver
- B.
Gateway
- C.
Router
- D.
Switch
- 3.What layers of the open systems interconnection (OSI) model do network interface cards (NIC) belong
- A.
Data link and Network layer
- B.
Physical and Network layer
- C.
Physical layer and Data link layer
- D.
Physical, Data Link, and Network layer
- 4.The device that receives a digital signal and regenerates the signal along the next leg of the medium is a
- A.
Bridge
- B.
Brouter
- C.
Gateway
- D.
Repeater
- 5.A repeater with more thean one output port is a
- A.
Hub
- B.
Bridge
- C.
Brouter
- D.
Gateway
- 6.What can be used to extend the size of a network
- A.
Switch
- B.
Brouter
- C.
Active hubs
- D.
Passive hubs
- 7.What is a device that subdivides a network into smaller logical pieces, or segments
- A.
Switch
- B.
Brouter
- C.
Gateway
- D.
Repeater
- 8.What is the time a switch takes to figure out where to forward a data unit is called
- A.
Lag
- B.
Hop
- C.
Latency
- D.
Time zone
- 9.What network device is a combination of networking hardware and software that connect two dissimilar kinds of networks
- A.
Switch
- B.
Brouter
- C.
Gateway
- D.
Repeater
- 10.What type of gateway can restrict the kind of access local are network (LAN) users have to the internet, and vice versa
- A.
A voice/data gateway
- B.
An internet gateway
- C.
A LAN gateway
- D.
A firewall
- 11.What type of gateway might include remote access servers that allow dial-up connectivity to a local area network (LAN)
- A.
A voice/data gateway
- B.
An internet gateway
- C.
A LAN gateway
- D.
A firewall
- 12.What is the routing protocol of interenet backbones
- A.
Border Gateway Protocol (BGP)
- B.
Open Shortest Path First (OSPF)
- C.
Routing Information Protocol (RIP)
- D.
Enhanced Interior Gateway Routing Protocol (EIGRP)
- 13.Based on a specific input address, which local area network (LAN) switch has the lowest delay and should be considered for supporting real-time applications
- A.
Hybrid switch
- B.
Cut-through switch
- C.
Fragment-free switch
- D.
Store and forward switch
- 14.What synchronous optical network (SONET) device aggregates or splits SONET traffic at various speedxs so as to provide access to SONET without demultiplexing the SONET signal stream
- A.
Add/drop multiplexer (ADM)
- B.
Drop-and-repeat node (D+R)
- C.
Digital cross connect (DCS)
- D.
Digital line carrier (DLC)
- 15.What synchronous optical network (SONET) devices configured to split SONET traffic and copy individual channels on two or more output links
- A.
Add/drop multiplexer (ADM)
- B.
Drop-and-repeat node (D+R)
- C.
Digital cross connect (DCS)
- D.
Digital line carrier (DLC)
- 16.When tributary units are grouped together they form
- A.
A tributary unit group (TUG)
- B.
A virtual container (VC)
- C.
Synchronous transport signal level N (STS-N) frames
- D.
Synchronous transport modules (STM) frames
- 17.An OC-12's electrical signal is the same as a synchronous transport signal level-12 (STS-12) frame and equal to what synchronous transport modules (STM) frame
- A.
STM-2
- B.
STM-4
- C.
STM-6
- D.
STM-8
- 18.Because of its cost, Asynchronous Transfer Mode (ATM) is rarely used on small local area networks (LAN). What technology is better suited for LANs
- A.
Gigabit Ethernet
- B.
Fast Ethernet
- C.
Ethernet
- D.
Synchronous optical network (SONET)
- 19.What topology defines the layout of a network's devices and media
- A.
Physical
- B.
Logical
- C.
Star
- D.
Hybrid
- 20.What topology consists of devices connected to a common. shared cable
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 21.What topology consists of a cable segments from each computer connected to a centralized component
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 22.What topology has the stations connected in the form of a circle
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 23.What topology combines two or more different physical topologies in a single network
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 24.What is not an advantage of a logical, bus topology
- A.
There are no collisions
- B.
If a node is down, it does not bring down the entire network
- C.
It's the most widely implemented of the logical topologies
- D.
Additions and changes can be made easily without affecting other workstations
- 25.What is an advantage of a logical ring topology
- A.
There are no collisions
- B.
If a node is down, it does not bring down the entire network
- C.
It's the most widely implemented of the logical topologies
- D.
Additions and changes can be made easily without affecting other workstations
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