tech 4 to 5
Three of the following terms mean the same thing. Which of the following terms does not mean the same as the others?
Common Channel Signaling
M8L1 What should you use to inspect the IP address of a Windows operating system PC?
IPconfig
A Class 5 office connects individual subscribers to the telephone network and is also referred to as: End Office Central Office Local Office All of the above
All of the above
Analog signals on copper cable can be distorted by: Magnetic fields Alternating current fields Radio waves All of the above
All of the above
Central offices are connected to which of the following: Class 4 offices Other central offices Individual subscribers All of the above
All of the above
Which statement best describes ISDN DSS1?
It controls signaling between the customer and the CO.
Which ISDN protocol allows us to pass signaling between networked PBXs?
QSIG
Which activities occur at the Application Layer?
All of the above
Why is ATM better for multimedia? All cells are the same size. Cells are small. ATM runs over fast fiber optics. All of the above.
All of the above.
A sound card is what general type of computer component?
All the Above
The modified IP header ToS byte supports which QoS mechanism?
DiffServ
A Ping command uses which ICMP message types? (Choose two.)
Echo Request Echo Reply
Which of the following cable types can transmit data farthest?
Fiber Optic
Which of the following is an example of a Network Layer protocol?
IP
A sound card is what general type of computer component?
Input/Output
21. Which tagging method supports thousands of VLANs?
802.1Q
Which of the following WAN services usually provides the highest bandwidth?
SONET
The connection between switching systems is referred to as a:
Trunk
In a Class A Internet address, which of the following network numbers are reserved? (Choose all that apply)
0 127
Ethernet operates at all speeds except which of the following?
16 Kbps
How many wire pairs can be terminated on a 66 block?
25-50
How many unique addresses are supported by IP version 6?
2^128
How many 802.1p header bits identify the frame's priority, and how many frame classes does the standard define?
3, 8
Which DSCP bits can administrators use to define custom DiffServ packet PHBs?
3-5
How large is the IP version 4 address field?
32 bits
The DiffServ DSCP specifies that how many bits in the modi- fied IP ToS field are used to designate the packet's PHB?
6
The default PCM voice digitization rate is ____________.
64 Kbps
Which VLAN tagging standard header does IEEE 802.1p modify to identify Ethernet frame priority?
802.1Q
What makes a crossover cable different from a patch cord?
A crossover cable uses the 568A pattern on one jack, and the 568B pattern on the other. A patch cord uses the same pinout pattern on both jacks.
What is a broadcast frame?
A frame addressed to "all nodes"
The OSI model Presentation Layer does which of the following?
All of the above
The Session Layer is concerned with which of the following? Managing dialog Beginning dialog Ending dialog All of the above
All of the above
Which of the following devices isolate traffic in an Ethernet network? Bridge Switch Router All of the above
All of the above
Which of the following is a function of hubs and repeaters? Provide for cable extension Repeat digital signals Interconnect different cable types All of the above
All of the above
MGCP is also known as what type of protocol?
Master/slave
Which of the following is most typical of a broadband network?
Multiple analog channels
Which of the following hardware devices builds a frame?
NIC
At which OSI layer do routers operate?
Network Layer
The Transport Layer is not concerned with which of the following? Addressing Connection management Flow control Buffering None of the above
None of the above
When signaling takes place over a separate path than the path the analog voice signal takes it is referred to as:
Out-of-band signaling
Which of the following confirms connectivity between hosts?
Ping
Tracert uses which of the following commands and IP fields to carry out its operation?
Ping and TTL
The SS7 ISUP protocol provides what services? (Choose two.)
Protocols to connect calls over the PSTN
How are bits represented on fiber optic cable?
Pulses (on/off) of light
Zones maintain domain name information in which record types?
RRs
Which of the following will not occur at the Physical Layer?
Rerouting of information
The CS in CSMA/CD refers to the ability of an Ethernet node to do which of the following?
Sense an electrical signal
An Ethernet LAN that uses UTP cabling and a hub as the physical medium is referred to as which of the following?
Star
M6L5 When a CO switch provides a business telephone switching services, it is referred to as:
Centrex
Which class of Internet address provides the fewest network numbers, but the greatest number of hosts per network?
Class A
WANs are shifting away from switched services and increasingly using dedicated network services. True or False?
False
Which choices are TCP features? (Choose three.)
Flow control Packet error recovery Demultiplexing multiple applications
Which two are sources of H.323 network voice transmission delays? (Choose two.)
Compression delay DSP delay
Which of the following scenarios requires a gateway?
Connecting an IP network to an AppleTalk network
To resolve FQDNs to binary IP addresses, resolvers contact which type of TCP/IP application server?
DNS
When two tones are used to signal switching equipment it is called:
DTMF
At which OSI layer do bridges operate?
Data Link Layer
At which OSI layer do switches reside?
Data Link Layer
Which of the following is not considered a QoS parameter?
Flows
The CD in CSMA/CD refers to the ability of an Ethernet node to do which of the following?
Detect frame collisions
Performance will likely increase in an Ethernet network when which of the following occurs?
Hubs are replaced by switches.
Which DHCP network address allocation mechanism assigns a host a temporary IP address?
Dynamic
What is the main advantage of star topology?
Ease of Management
An MG consists of which two components? (Choose two.)
Endpoints Connections
You need to reconfigure a Linux server to change the address of its default gateway. What tool should you use?
IFconfig
Which of the following shows the IP address assigned to a PC running Windows XP / 7?
IPconfig
The main reason for the creation of IP version 6 is:
IPv4 does not provide enough unique addresses
Which choice describes the time it takes for a packet to move through a network?
Latency
At what OSI model layer does DiffServ operate?
Layer 3
Which of the following is another name for a CO?
Local exchange
The physical connection that links an individual telephone to the telephone company CO switch is referred to as a:
Local loop
Which of the following applications use UDP services? (Choose three.)
TFTP SNMP DNS
What is the main advantage of using balanced signaling on a serial cable?
The cable can be longer because balanced signaling is less vulnerable to interference.
What is the purpose of bandpass filtering on a POTS line?
To remove high-frequency noise
Bridges are needed in which of the following situations?
Too much traffic on the LAN Remote connection of two LANs over a WAN link
Which of the following commands shows the path between source and destination in a TCP/IP network?
Tracert
Which of the following troubleshooting tools tells you the distance, in hops, to the destination computer?
Tracert
Segmenting traffic between different portions of a single LAN is referred to as:
Traffic isolation
Which of the following is the primary purpose of a Physical Layer protocol?
Transmit bits across a physical link
Which of the following is the primary purpose of a Data Link Layer protocol?
Transmit frames across a physical link
Which of the following is the primary purpose of a Transport Layer protocol?
Transmit messages from process to process
The two primary classifications of bridges are:
Transparent and source route
Which layer uses port numbers for communication?
Transport Layer
A frame relay network uses fewer lines to connect 10 locations than a T1 mesh, and is therefore more cost effective. True or False?
True
Collisions are normal on CSMA/CD LANs and not usually the result of errors. True or False?
True
Frame headers and packet headers contain addresses. True or False?
True
The primary purpose of a device driver is to control hardware under the supervision of the OS. True or False?
True
You suspect that a crossover cable has been installed instead of a patch cable. What can you use to identify the cable? (Choose two.)
Visual inspection of both connectors Media tester/certifier
What is the most important troubleshooting question?
What has changed?
At what point does end-to-end delay in a voice conversation become unacceptable?
When it approaches 500 ms
M1L5 When is UTP cable preferred over STP?
When there is electrical interference
Which of the following is the primary difference between a public and private network?
Who owns and maintains the network
Which two TCP/IP tools can you use to force a workstation to renew its DHCP lease? (Choose two.)
Winipcfg IPconfig
Can switches switch two frames simultaneously?
Yes
Which OSI model layers are concerned primarily with applications?
The top three
What do bridges require that hubs and repeaters do not?
Address tables
Which of the following is the unit of data transferred by an ATM network?
Cell
ATM requires fiber media to run. True or False?
False
Which of the following network topologies forms a closed loop?
Ring Topology
What components are common to all computer systems?
A. Processor B. Memory C. Storage D. I/O
At which points in a one-way, multiple hop, end-to-end IP communications session will a frame have to be built? (Choose two.)
At each hop's router outbound port At the sending host's LAN port
Which connector type is used with Thinnet coaxial cable?
BNC
What is the key reason that smart LAN administrators demand well-made cable connections?
Bad cable connections degrade a network's performance.
Which of the following network topologies connects devices to a shared straight-line cable?
Bus Topology
QSIG supports which of the following ISDN supplementary services? (Choose three.)
Call transfer Calling party identification Generic functions
What is the first step in troubleshooting a network?
Establish the symptoms
Which of the following is the most popular LAN Data Link Layer technology?
Ethernet
Which of the following troubleshooting tools is not part of a standard TCP/IP implementation?
Event Viewer
A line that goes from a customer's site through a CO to a remote CO in another part of the country is known as a:
FX line
The Network Layer is to packets as the Data Link Layer is to:
Frames
The H.323 component that provides such capabilities as billing, authentication, and accounting is a(n) _____.
Gatekeeper
What does I/O stand for?
Input/Output
Which two solutions might we use to address jitter problems in a VoIP network? (Choose two.)
Install devices that provide jitter buffers Prioritize network voice traffic
Which term describes the variability of delay a packet experiences as it travels between network devices?
Jitter
The device that provides multiple telephone extensions access to a group of single telephone lines is a:
Key system
Which of the following are the two primary types of light sources in fiber optic cables?
Laser diode and LED
Which QoS parameter might most concern us considering the Internet's "best effort" delivery nature?
Packet loss
Hubs and repeaters operate at which layer of the OSI model?
Physical Layer
Which of the following is not a layer of the TCP/IP protocol stack?
Physical Layer
The digital network used to create the route a call will take is referred to as:
SS7
A NIC is a device used for:
Signaling
Which SS7 network component stores customer information in databases?
Signaling Control Point
In the IP address 128.18.72.24:80, what does the number 80 represent?
The TCP or UDP port number
Which best describes IP's use of the TTL value?
The TTL specifies the time a datagram is allowed to remain on the network.
Which layers are primarily concerned with moving raw data?
The lower four
How does DHCP pass configuration information to TCP/IP hosts?
The option codes
Which of the following cable types uses a T-connector to connect each NIC to the cable?
Thinnet
Which of the following would not be used in a typical star topology?
Thinnet
A dedicated CO circuit that links two points is referred to as a:
Tie Line
Each wire of a local loop is sometimes referred to as:
Tip and Ring
An Application Layer utility transmits network administration and control messages between nodes. It must not use any more of the network's bandwidth than absolutely necessary. If messages are corrupted or lost, the utility handles retransmission, so it doesn't need this service from the lower layers. This application should use the services of:
UDP
Which best describes the UDP demultiplexing process?
UDP uses port numbers to allow multiple applications to communicate simultaneously on the same host.
