3c251 Volume 3
3C251 Volume 3. URE's only.
- 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 device to a fiber or copper cable?
- A.
Transceiver
- B.
Gateway
- C.
Router
- D.
Switch
- 3.What device provides physical, electrical, and electronic connections to the network media?
- A.
Bridge
- B.
Router
- C.
Gateway
- D.
Network interface card (NIC)
- 4.What layers of the open system interconnection (OSI) model do network interface cards (NIC) belong?
- A.
Data Link and Network layer
- B.
Physical layer and Network layer
- C.
Physical layer and Data Link layer
- D.
Physical, Data Link, and Network layer
- 5.The device that receives a digital signal and regenerates the signal along the next leg of the medium is a
- A.
Bridge
- B.
Router
- C.
Gateway
- D.
Repeater
- 6.A repeater with more than one output port is a
- A.
Hub
- B.
Bridge
- C.
Router
- D.
Gateway
- 7.What can be used to extend the size of a network?
- A.
Router
- B.
Gateway
- C.
Active hubs
- D.
Passive hubs
- 8.What is a device that subdivides a network into smaller logical pieces, or segments?
- A.
Switch
- B.
Router
- C.
Gateway
- D.
Repeater
- 9.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
- 10.What network device is a combination of networking hardware and software that connect two dissimilar kinds of networks?
- A.
Switch
- B.
Router
- C.
Gateway
- D.
Repeater
- 11.What type of gateway can restrict the kind of access local area network (LAN) users have to the internet, and vice verse?
- A.
A voice/data gateway
- B.
An internet gateway
- C.
A LAN gateway
- D.
A firewall
- 12.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
- 13.What is a router's strength?
- A.
Its intelligence
- B.
Its quality of service
- C.
Its different interface cards
- D.
Its different types of network connections
- 14.What is the oldest routing protocol?
- A.
Border Gateway Protocol (BGP)
- B.
Open Shortest Path First (OSPF)
- C.
Routing Information Protocol (RIP)
- D.
Enhanced Information Gateway Routing Protocol (EIGRP)
- 15.What is the routing protocol of internet backbones?
- A.
Border Gateway Protocol (BGP)
- B.
Open Shortest Path First (OSPF)
- C.
Routing Information Protocol (RIP)
- D.
Enhanced Information Gateway Routing Protocol (EIGRP)
- 16.Based on a specific input address, which level local area network (LAN) switch has the lowest delay and should be considered for supporting real-time application?
- A.
Hybrid switch
- B.
Cut-through switch
- C.
Fragment-free switch
- D.
Store and forward switch
- 17.What synchronous optical network (SONET) device aggregates or splits SONET traffic at various speeds 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)
- 18.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.
Terminal multiplexer (TM)
- D.
Digital line carrier (DLC)
- 19.When tributary units are grouped together they form
- A.
A tributary unit group (TUG)
- B.
A virtual container
- C.
Synchronous transport signal level N (STS-N) frames
- D.
Synchronous transport modules (STM) frames
- 20.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
- 21.Because of its cost, Asynchronous Transfer Module (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)
- 22.What topology defines the layout of a network's devices and media?
- A.
Physical
- B.
Logical
- C.
Star
- D.
Hybrid
- 23.What topology consists of devices connected to a common, shared cable?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 24.What topology consist of cable segments from each computer connected to a centralized component?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 25.What topology has the stations connected in the form of a circle?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
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