3c251 Volume 3
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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
- 26.What topology combines two or more different physical topologies in a single network?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
- 27.What is not an advantage of a logical bus topology?
- A.
There are no collisions
- B.
If the 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
- 28.What is an advantage of a logical ring topology?
- A.
There are no collisions
- B.
If the 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
- 29.What data communication protocol use characters and symbols (character code set) to govern the flow and format of information between systems?
- A.
Character-oriented
- B.
Bit-oriented
- C.
Routing
- D.
Internet
- 30.What data communication protocol uses character control or "handshaking" to link and represent information?
- A.
Asynchronous protocol
- B.
Binary synchronous protocol
- C.
Synchronous Data Link Control (SDLC)
- D.
High-Level Data Link Control (HDLC)
- 31.What data communication protocol is based on bits and the position of bits?
- A.
Character-oriented
- B.
Bit-oriented
- C.
Routing
- D.
Internet
- 32.What data communication protocol ensures that the receiving station can distinguish information from garbage?
- A.
Asynchronous protocol
- B.
Binary synchronous protocol
- C.
Synchronous Data Link Control (SDLC)
- D.
High-Level Data Link Control (HDLC)
- 33.What network protocol had DOD chosen as its standard to govern the flow of information?
- A.
Binary synchronous protocol (BSP)
- B.
Synchronous Data Link Control (SDLC)
- C.
High-Level Data Link Control (HDLC)
- D.
Transmission control protocol/internet protocol (TCP/IP)
- 34.What transmission control protocol/internet protocol (TCP/IP) Network layer protocol provides information about how and when data should be delivered, including the data's source and destination address?
- A.
Internet Protocol (IP)
- B.
Address Resolution Protocol (ARP)
- C.
Reverse Address Resolution Protocol (RARP)
- D.
Internet Control Message Protocol (ICMP)
- 35.What transmission control protocol/internet protocol (TCP/IP) Network layer protocol provides the service of matching a known internet protocol (IP) address for a destination device to a Media Access Control (MAC) address?
- A.
IP
- B.
Address Resolution Protocol (ARP)
- C.
Reverse Address Resolution Protocol (RARP)
- D.
Internet Control Message Protocol (ICMP)
- 36.What transmission control protocol/internet protocol (TCP/IP) Network layer protocol provides messaging that can help with troubleshooting?
- A.
IP
- B.
Address Resolution Protocol (ARP)
- C.
Reverse Address Resolution Protocol (RARP)
- D.
Internet Control Message Protocol (ICMP)
- 37.What transmission control protocol/internet protocol (TCP/IP) Application layer protocol is used to send and receive files via TCP/IP?
- A.
File Transfer Protocol (FTP)
- B.
Trivial File Transfer Protocol (TFTP)
- C.
Simple Mail Transfer Protocol (SMTP)
- D.
HyperText Transfer Protocol (HTTP)
- 38.Which protocol is a simpler way to transfer files between computers but is simpler and more trivial then File Transfer Protocol (FTP)?
- A.
File Transfer Protocol (FTP)
- B.
Trivial File Transfer Protocol (TFTP)
- C.
Simple Mail Transfer Protocol (SMTP)
- D.
HyperText Transfer Protocol (HTTP)
- 39.What transmission control protocol/internet protocol (TCP/IP) Application layer protocol is a terminal emulation protocol used to log onto remote host?
- A.
Telnet
- B.
Trivial File Transfer Protocol (TFTP)
- C.
Simple Mail Transfer Protocol (SMTP)
- D.
HyperText Transfer Protocol (HTTP)
- 40.What transmission control protocol/internet protocol (TCP/IP) Application layer protocol is an automated means of assigning a unique IP address to every device on a network?
- A.
Dynamic Host Configuration Protocol (DHCP)
- B.
Trivial File Transfer Protocol (TFTP)
- C.
Simple Mail Transfer Protocol (SMTP)
- D.
HyperText Transfer Protocol (HTTP)
- 41.What transmission control protocol/internet protocol (TCP/IP) Application layer protocol is a simple protocol used to synchronize the clocks of computers on a network?
- A.
Dynamic Host Configuration Protocol (DHCP)
- B.
Simple Network Management Protocol (SNMP)
- C.
Network Time Protocol (NTP)
- D.
Packet Internet Grouper (PING)
- 42.What transmission control protocol/internet protocol (TCP/IP) Application layer protocol is a utility that can verify that TCP/IP is installed and communicating with the network?
- A.
Dynamic Host Configuration Protocol (DHCP)
- B.
Simple Network Management Protocol (SNMP)
- C.
Network Time Protocol (NTP)
- D.
Packet Internet Grouper (PING)
- 43.What is a group of computers and associated devices that share a common communications line within a small geographic?
- A.
Metropolitan area network (MAN)
- B.
Local area network (LAN)
- C.
Wide area network (WAN)
- D.
Virtual Private Network (VPN)
- 44.The interconnection of several networks of computer resources in a city into a single larger network is a
- A.
Local area network (LAN)
- B.
Wide area network (WAN)
- C.
Virtual Private Network (VPN)
- D.
Metropolitan area network (MAN)
- 45.What type of network enables a group of two or more computer systems to communicate over the public Internet?
- A.
Local area network (LAN)
- B.
Wide area network (WAN)
- C.
Virtual Private Network (VPN)
- D.
Metropolitan area network (MAN)
- 46.What network model enables users to share resources, files, and printers in a decentralized way?
- A.
Intranet
- B.
Extranet
- C.
Peer-to-Peer
- D.
Client-Server
- 47.What network model is a centralized model for data storage, security, running applications, and network administration?
- A.
Intranet
- B.
Extranet
- C.
Peer-to-Peer
- D.
Client-Server
- 48.What is the physical address of any device on the network?
- A.
Internet protocol version 4 (IPv4) address
- B.
Internet protocol version 6 (IPv6) address
- C.
Static internet protocol (IP) address
- D.
Media Access Control (MAC) address
- 49.What address is a 32-bit number?
- A.
Internet protocol version 4 (IPv4)
- B.
Internet protocol version 6 (IPv6)
- C.
Static internet protocol (IP)
- D.
Media Access Control (MAC)
- 50.What address uses a 128-bit addressing scheme?
- A.
Internet protocol version 4 (IPv4)
- B.
Internet protocol version 6 (IPv6)
- C.
Static internet protocol (IP)
- D.
Media Access Control (MAC)
- 51.How many subnet bits are required to support 85 subnets on a Class B network?
- A.
Three
- B.
Five
- C.
Seven
- D.
Nine
- 52.What is not a recommendation for planning networks using variable length subnet masking (VLSM)?
- A.
Start with the shortest mask
- B.
Re-address the entire network
- C.
Aim to use contiguous subnets where possible
- D.
Choose one or more available subnets and subnet further
- 53.What cable impairments can be detected by a time-domain reflectometer (TDR)?
- A.
Open, shorts, and bad grounds
- B.
Pinholes, shorts, and bad grounds
- C.
Shorts, kinks, and low cable pressure
- D.
Kinks, opens, and corroded connectors
- 54.What type of cable property changes can be detected by a time-domain reflectometer (TDR) to identify problems?
- A.
Conductance
- B.
Inductance
- C.
Capacitance
- D.
Impedance
- 55.How is the optical time-domain reflectometer (OTDR) used to measure signal loss?
- A.
It should not be used
- B.
Pulse width is increased
- C.
Back scattered light is decreased
- D.
Light pulse power is set for constant output
- 56.When using the cable scanner wire-map feature, what action is required to prevent false readings?
- A.
Connect a launch cable between the test set and the cable being tested
- B.
Connect an injector cable at the end of the cable being tested
- C.
Set the range for maximum reading
- D.
Use the frequency mode
- 57.How does a cable scanner identify crossover and straight-through cables?
- A.
It locates splices, bridge taps, and split pairs
- B.
It provides wiring maps at both ends of the cable
- C.
It monitors and provides access to multiple conductors
- D.
It measures electrical voltage, current, frequency, and resistance
- 58.What test equipment provides a capability for digital network diagnostics and developing communications software?
- A.
A digital distortion analyzer
- B.
A protocol analyzer
- C.
A communications test set
- D.
A data analysis center
- 59.What component of a protocol analyzer discards frames based on its definition or activates a trigger based on the trigger definition?
- A.
Counter
- B.
Buffer
- C.
Central processing unit (CPU)
- D.
Filter
- 60.What component of a protocol analyzer stores all frames based on the user configuration inputs?
- A.
Counter
- B.
Buffer
- C.
Central processing unit (CPU)
- D.
Filter
- 61.What protocol analyzer test window reports errors that occur at the physical layer such as bad frame check sequence (FCS), short frames, and jabbers?
- A.
Media Control Access (MAC) node statistics
- B.
Connection statistics
- C.
Protocol statistics
- D.
Node discovery
- 62.What protocol analyzer test window provides information concerning the bandwidth utilization and the number of connections that are related to specific nodes?
- A.
Media Control Access (MAC) node statistics
- B.
Connection statistics
- C.
Protocol statistics
- D.
Node discovery
- 63.What is the first local area network (LAN) impairment error that occurs when bits are missing in one or more octets in a frame?
- A.
Frame check sequence
- B.
Alignment
- C.
Collision
- D.
Jabber
- 64.What local area network (LAN) impairment error that occurs when network nodes in the same domain transmit at the same time?
- A.
Frame check sequence
- B.
Alignment
- C.
Collision
- D.
Jabber
- 65.
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Runt
- B.
Giant
- C.
Undersized Packet
- D.
Oversized packet
- 66.What local area network (LAN) impairment error occurs when an internet protocol (IP) data unit is smaller than 28 bytes is received?
- A.
Runt
- B.
Giant
- C.
Undersized packet
- D.
Oversized packet
- 67.What local area network (LAN) error occurs when frames that are larger than the maximum size the network protocol requires are received?
- A.
Runt
- B.
Giant
- C.
Undersized packet
- D.
Oversized packet
- 68.What is a good indication of how well any two nodes can access the transmission media and transmit and receive data along the link or path in a reliable manner?
- A.
Runts
- B.
Fragmentation
- C.
Round-trip delay
- D.
Frame check sequence
- 69.Jabbers manifest themselves on a local area network (LAN) as
- A.
Delay
- B.
Collisions
- C.
Oversized packets
- D.
Undersized packets
- 70.When using the Trace Route utility, round-trip delay is displayed in
- A.
Seconds
- B.
Milliseconds
- C.
Microseconds
- D.
Nanoseconds
- 71.Which network management function provides the capability to initialize, operate and shut down managed devices?
- A.
Fault management
- B.
Accounting management
- C.
Performance management
- D.
Configuration management
- 72.Which network management function obtains the utilization and error rates of network devices and provides statistical data about the network?
- A.
Fault management
- B.
Accounting management
- C.
Performance management
- D.
Configuration management
- 73.Which network management element is a type of node connected to the network such as a switch, router, computer, or printer?
- A.
Network management information base
- B.
Network management protocol
- C.
Management agent
- D.
Manged device
- 74.What protocol allows products from different vendors to be managed by a single network management application?
- A.
File Transfer Protocol (FTP)
- B.
Simple Mail Transfer Protocol (SMTP)
- C.
Transmission control protocol (TCP)
- D.
Simple Network Management Protocol (SNMP)
- 75.What is the purpose of the community name that is used with network management systems (NMS)?
- A.
Authenticate Simple Network Management Protocol (SNMP) requests
- B.
Authenticate transmission control protocol (TCP)
- C.
Authenticate Simple Mail Transfer Protocol (SMTP)
- D.
Authenticate File Transfer Protocol (FTP)
- 76.When the network management software is first installed, what type of alarm threshold value is loaded into the management information base?
- A.
No values are loaded
- B.
Default values are loaded
- C.
A value of 0 is loaded for all devices
- D.
A value of 100 is loaded for all devices
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