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NEW QUESTION 28
CORRECT TEXT
Fill in the blank with the appropriate term. The ____________ is used for routing voice conversations over the Internet. It is also known by other names such as IP Telephony, Broadband Telephony, etc.

Answer:

Explanation:
VoIP
Explanation:
The Voice over Internet Protocol (VoIP) is used for routing of voice conversation over the Internet. The VoIP is also known by other names such as IP Telephony, Broadband Telephony, etc. Analog signals are used in telephones in which the sound is received as electrical pulsation, which is amplified and then carried to a small loudspeaker attached to the other phone, and the call receiver can hear the sound. In VoIP, analog signals are changed into digital signals, which are transmitted on the Internet. VoIP is used to make free phone calls using an Internet connection, and this can be done by using any VoIP software available in the market. There are various modes for making phone calls through the Internet. Some of the important modes are as follows: Through Analog Telephone Adapter (ATA) In this mode, the traditional phone is attached to the computer through AT
A. ATA receives analog signals from the phone and then converts these signals to digital signals. The digital signals are then received by the Internet Service Providers (ISP), and the system is ready to make calls over VoIP. Through IP Phone IP Phones look exactly like the traditional phones, but they differ in that they have RJ-45 Ethernet connectors, instead of RJ-11 phone connectors, for connecting to the computers. Computer To Computer This is the easiest way to use VoIP. For this, we need software, microphone, speakers, sound card and an Internet connection through a cable or a DSL modem. Soft Phones Soft phone is a software application that can be loaded onto a computer and used anywhere in the broadband connectivity area.

NEW QUESTION 29
Which of the following is a method of authentication that uses physical characteristics?

• A. ACL
• B. COMSEC
• C. Biometrics
• D. Honeypot

Answer: C

NEW QUESTION 30
Which of the following cables is made of glass or plastic and transmits signals in the form of light?

• A. Twisted pair cable
• B. Fiber optic cable
• C. Plenum cable
• D. Coaxial cable

Answer: B

Explanation:
Fiber optic cable is also known as optical fiber. It is made of glass or plastic and transmits signals in the form of
light. It is of cylindrical shape and consists of three concentric sections: the core, the cladding, and the jacket.
Optical fiber carries much more information than conventional copper wire and is in general not subject to
electromagnetic interference and the need to retransmit signals. Most telephone company's long-distance lines
are now made of optical fiber. Transmission over an optical fiber cable requires repeaters at distance intervals.
The glass fiber requires more protection within an outer cable than copper.
Answer option B is incorrect. Twisted pair cabling is a type of wiring in which two conductors (the forward and
return conductors of a single circuit) are twisted together for the purposes of canceling out electromagnetic
interference (EMI) from external sources. It consists of the following twisted pair cables:
Shielded Twisted Pair: Shielded Twisted Pair (STP) is a special kind of copper telephone wiring used in some
business installations. An outer covering or shield is added to the ordinary twisted pair telephone wires; the
shield functions as a ground. Twisted pair is the ordinary copper wire that connects home and many business
computers to the telephone company. Shielded twisted pair is often used in business installations. Unshielded
Twisted Pair: Unshielded Twisted Pair (UTP) is the ordinary wire used in home. UTP cable is also the most
common cable used in computer networking. Ethernet, the most common data networking standard, utilizes
UTP cables. Twisted pair cabling is often used in data networks for short and medium length connections
because of its relatively lower costs compared to optical fiber and coaxial cable.UTP is also finding increasing
use in video applications, primarily in security cameras. Many middle to high-end cameras include a UTP
output with setscrew terminals. This is made possible by the fact that UTP cable bandwidth has improved to
match the baseband of television signals.
Answer option A is incorrect. Coaxial cable is the kind of copper cable used by cable TV companies between
the community antenna and user homes and businesses. Coaxial cable is sometimes used by telephone
companies from their central office to the telephone poles near users. It is also widely installed for use in
business and corporation Ethernet and other types of local area network. Coaxial cable is called "coaxial"
because it includes one physical channel that carries the signal surrounded (after a layer of insulation) by
another concentric physical channel, both running along the same axis. The outer channel serves as a ground.
Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters,
can carry information for a great distance. It is shown in the figure below:

Answer option C is incorrect. Plenum cable is cable that is laid in the plenum spaces of buildings. The plenum
is the space that can facilitate air circulation for heating and air conditioning systems, by providing pathways for
either heated/conditioned or return airflows. Space between the structural ceiling and the dropped ceiling or
under a raised floor is typically considered plenum. However, some drop ceiling designs create a tight seal that
does not allow for airflow and therefore may not be considered a plenum air-handling space. The plenum
space is typically used to house the communication cables for the building's computer and telephone network.

NEW QUESTION 31
Which of the following fields in the IPv6 header is decremented by 1 for each router that forwards the packet?

• A. Flow label
• B. Next header
• C. Traffic class
• D. Hop limit

Answer: D

NEW QUESTION 32
Which of the following are the various methods that a device can use for logging information on a Cisco router? Each correct answer represents a complete solution. Choose all that apply.

• A. Terminal logging
• B. Console logging
• C. SNMP logging
• D. Syslog logging
• E. NTP logging
• F. Buffered logging

Answer: A,B,C,D,F

Explanation:
There are different methods that a device can use for logging information on a Cisco router:
Terminal logging: In this method, log messages are sent to the VTY session.
Console logging: In this method, log messages are sent directly to the console port.
Buffered logging: In this method, log messages are kept in the RAM on the router. As the buffer
fills, the older messages are overwritten by the newer messages.
Syslog logging: In this method, log messages are sent to an external syslog server where they are
stored and sorted.
SNMP logging: In this method, log messages are sent to an SNMP server in the network.
Answer option C is incorrect. This is an invalid option.

NEW QUESTION 33
......

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