Question 1

An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?

Accepted Answer

B

Question 2

What layer of the OSI model describes how data between applications is synced and recovered if messages don't arrive intact at the receiving application?

Accepted Answer

The Session Layer of the OSI model is responsible for establishing, managing, and terminating connections between applications. It ensures that data is properly synchronized and recovered if messages do not arrive intact at the receiving application.

Question 3

Static electricity is an electrical charge in motion.

Accepted Answer

The statement is incorrect. Static electricity is an electrical charge that is stationary and not in motion.

Question 4

The Transmission Control Protocol (TCP) is considered to be a connectionless, or best-effort delivery protocol.

Accepted Answer

The Transmission Control Protocol (TCP) is considered to be a connection-oriented protocol that guarantees reliable delivery of data packets between hosts. It is not connectionless or best-effort delivery like the User Datagram Protocol (UDP).

Question 5

The proper handling procedures for substances such as chemical solvents is typically outlined in which of the following options?

Accepted Answer

The proper handling procedures for substances such as chemical solvents are typically outlined in the Material Safety Data Sheet (MSDS), which provides important safety information about hazardous chemicals, including their physical and chemical properties, health hazards, and safety precautions for handling, storage, transportation, and disposal. The Toxic Chemical Safety Procedure (TCSP), Dangerous and Hazardous Waste Disposal Sheet (DHWDS), and Environmental Chemical Hazard Sheet (ECHS) may also contain some safety information but are not specific to chemical solvents.

Question 6

In general, an API (application programming interface) call is the method an application uses when it makes a request of the OS.

Accepted Answer

An API call is a method used by an application to request a service or resource from an operating system or another application.

Question 7

What is a defining characteristic of a bus topology based network?

Accepted Answer

A defining characteristic of a bus topology based network is that devices are daisy-chained together in a single line. Each device is connected to the same cable, which acts as the backbone of the network. Data transmitted by one device is received by all other devices on the network, but only the intended recipient processes the data.

Question 8

The Data Link layer attaches a trailer to the end of a packet, and does not include a header.

Accepted Answer

The Data Link layer includes both a header and a trailer. The header contains information such as source and destination addresses, while the trailer contains a checksum to ensure the integrity of the packet during transmission.

Question 9

The protocol data unit for the Physical layer of the OSI model is payload, or data.

Accepted Answer

The protocol data unit for the Physical layer of the OSI model is the bit. The payload or data is typically encapsulated within the bits by higher layers of the OSI model.

Question 10

After a problem and its symptoms have been identified, a theory regarding a probable cause should be established.

Accepted Answer

It is important to establish a theory regarding a probable cause after identifying a problem and its symptoms as it helps in finding an appropriate solution to the problem.

Question 11

At what layer of the OSI model does a network switch normally operate?

Accepted Answer

Network switches operate at Layer 2 of the OSI model, which is the data link layer. They use MAC addresses to forward and filter network traffic within a local area network (LAN). Layer 3 switches, on the other hand, operate at the network layer (Layer 3) and can perform IP routing in addition to switching functions.

Question 12

The term firmware refers to programs embedded into hardware devices. This software only changes when a firmware upgrade is performed.

Accepted Answer

Firmware is a type of software that is permanently programmed into a device's hardware. It is not typically updated unless a firmware upgrade is specifically performed. Therefore, the statement is true.

Question 13

A policy in which all exit doors for a building stay unlocked during a fire is an example of what type of policy?

Accepted Answer

A fail-open policy ensures that doors or systems remain open in the event of a failure or emergency. In this case, the exit doors remain unlocked during a fire, allowing for easier evacuation.

Question 14

HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model?

Accepted Answer

HTTP, IMAP4, FTP, and Telnet are all application layer protocols, which operate at Layer 7 according to the OSI model.

Question 15

The Transport layer header addresses a receiving application by a number called a MAC address.

Accepted Answer

The Transport layer header addresses a receiving application by a number called a port number, not a MAC address. The MAC address is used at the Data Link layer for communication between devices on a local network.

Question 16

What statement accurately reflects what occurs when a message is too large to transport on a network?

Accepted Answer

When a message is too large to transport on a network, the message is divided into smaller messages called segments (for TCP) or datagrams (for UDP) to enable their transport across the network. This process is known as fragmentation.

Question 17

The fundamental difference between a switch and a router is that a switch belongs only to its local network and a router belongs to two or more local networks.

Accepted Answer

A switch operates within a single network and connects devices together, while a router connects multiple networks together and directs traffic between them.

Question 18

If your network consists of all connected devices connecting to one central device, such as a switch, what type of topology is being used?

Accepted Answer

A star topology consists of all devices connecting to a central device, such as a switch. Bus topology is when devices connect to a shared communication line, mesh topology is when each device connects to every other device, and star bus topology is a combination of bus and star topologies. Therefore, the best choice for the given network is a star topology (B).

Question 19

The Data Link Layer utilizes what name for its protocol data unit (PDU)?

Accepted Answer

The Data Link Layer utilizes the frame as its protocol data unit (PDU), which is a structured unit of data that includes a header and footer. The header contains information such as source and destination addresses, while the footer contains error checking information.

Question 20

Servers that have a NOS installed require less memory, processing power, and storage capacity than clients because servers are called on to handle only light processing loads and requests from multiple clients.

Accepted Answer

Servers typically require more memory, processing power, and storage capacity than clients because they are responsible for handling heavier processing loads and requests from multiple clients simultaneously.

Quiz 1: Introduction to Networking