Question 21 · 191 in bank
What is the range for private ports?
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Answer: A
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Question 22 · 191 in bank
Which of the following layers provides communication session management between host computers?
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Answer: C
Question 23 · 191 in bank
Which of the following cables is made of glass or plastic and transmits signals in the form of light?
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Answer: D
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.
Question 24 · 191 in bank
Which of the following is a presentation layer protocol?
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Answer: B
Explanation
The presentation layer is the layer 6 of the OSI model, which is responsible for data representation, encryption, and compression. Among the given options, RPC (Remote Procedure Call) is a presentation layer protocol.
Source: Adapted from community discussion — thetha
Question 25 · 191 in bank
Which of the following is a session layer protocol?
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Answer: A
Explanation
The correct answer is B. SLP. SLP (Service Location Protocol) is a session layer protocol used to allow network services to advertise their existence to other network devices. It is used to locate network services such as printers, file servers, and directory services in a network. SLP allows clients to dynamically discover services and servers in a network and is used in conjunction with other protocols such as LDAP (Lightweight Directory Access Protocol) and DNS (Domain Name System). RPC (Remote Procedure Call) is a presentation layer protocol used for communication between applications running on different computers. RDP (Remote Desktop Protocol) is a presentation layer protocol used for remote desktop connections. ICMP (Internet Control Message Protocol) is a network layer protocol used for error reporting and network diagnostics.
Source: Adapted from community discussion — ethacker
Question 26 · 191 in bank
Which of the following IEEE standards provides specifications for wireless ATM systems?
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Answer: D
Explanation
None of the IEEE standards mentioned (802.1, 802.5, 802.3, and 802.11a) provide specifications for wireless ATM (Asynchronous Transfer Mode) systems. ATM is a networking technology that was developed in the late 1980s and early 1990s as a way to provide high-speed data transfer over broadband networks. ATM uses a fixed-length packet called a cell, which is 53 bytes in size, to transmit data. However, there are no IEEE standards for wireless ATM. There are other wireless networking technologies that have been developed to provide high-speed data transfer, such as WiMAX (IEEE 802.16) and LTE (Long-Term Evolution), which are designed to provide wireless broadband access.
Source: Adapted from community discussion — thetha
Question 27 · 191 in bank
Which of the following UTP cables supports transmission up to 20MHz?
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Answer: C
Explanation
Category 4 UTP cable is capable of supporting data transfer rates up to 16 Mbps, which was faster than Category 3 cable, but slower than Category 5 cable and later categories. The maximum frequency range for Category 4 cable is 20 MHz, which is the same as Category 3.
Source: Adapted from community discussion — thetha
Question 28 · 191 in bank
Which of the following is also known as slag code?
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Answer: B
Explanation
Also called “slag code,” a logic bomb frequently remains undiscovered until the function is executed or payload is launched. Logic bombs are also sometimes referred to as “code bombs” and “cyber bombs,” and there is virtually an unlimited set of conditions that can trigger a logic bomb.
Source: Adapted from community discussion — bitbizarrs
Question 29 · 191 in bank
Which of the following commands is used for port scanning?
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Answer: B
Question 30 · 191 in bank
Which of the following is a term to describe the use of inert gases and chemical agents to extinguish a fire?
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Answer: D
Explanation
The term used to describe the use of inert gases and chemical agents to extinguish a fire is "fire suppression". Fire suppression systems are designed to detect and extinguish fires in their early stages, before they can spread and cause significant damage. These systems can use a variety of methods to suppress fires, including the use of water, foam, and chemicals, as well as the use of inert gases such as carbon dioxide, nitrogen, and argon, which can displace oxygen and prevent the fire from spreading. Fire suppression systems are commonly used in commercial and industrial settings, such as data centers, laboratories, and manufacturing facilities, where the risk of fire is high and the potential damage from a fire can be significant.
Source: Adapted from community discussion — thetha
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