Network + CH1

D. Layer 7

HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model? A. Layer 4 B. Layer 5 C. Layer 6 D. Layer 7

A. Occupational Safety and Health Administration (OSHA)

What federal agency is charged with safety and health in the workplace? A. Occupational Safety and Health Administration (OSHA) B. Workplace Safety and Hazard Administration (WSHA) C. Office Safety and Standards Department (OSSD) D. Hazardous Materials and Safety Management (HMSM)

C. Session Layer

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? A. Application Layer B. Presentation Layer C. Session Layer D. Transport Layer

C. SMTP

What mail protocol is used to send mail messages to a server? A. POP3 B. IMAP4 C. SMTP D. HTTPS

A. fail-open

A policy in which all exit doors for a building stay unlocked during a fire is an example of what type of policy? A. fail-open B. fail-close C. fail-tolerant D. fail-oriented

True

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

D. Network

At what layer of the OSI model do the IP, ICMP, and ARP protocols operate? A. Application B. Session C. Transport D. Network

A. Layer 2

At what layer of the OSI model does a network switch normally operate? A. Layer 2 B. Layer 3 C. Layer 4 D. Layer 5

False

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. True False

False

Static electricity is an electrical charge in motion. True False

D. frame

The Data Link Layer utilizes what name for its protocol data unit (PDU)? A. packet B. data C. bit D. frame

False

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

C. Transport

The TCP and UDP protocols both exist at what layer of the OSI model? A. Application B. Presentation C. Transport D. Network

C. The message is divided into smaller messages called segments (for TCP) or datagrams (for UDP).

What statement accurately reflects what occurs when a message is too large to transport on a network? A. The message is discarded and must be sent again. B. The message is sent anyway, and is received by the destination as garbage data. C. The message is divided into smaller messages called segments (for TCP) or datagrams (for UDP). D. An ICMP error is generated, and the application must reformat the data for transmission.

B. The Presentation layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read.

In considering the responsibilities of each layer of the OSI model, what statement accurately reflects those of the Presentation layer? A. The Presentation layer describes the interface between two applications, each on separate computers. B. The Presentation layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read. C. The Presentation layer is responsible for describing how data between applications is synced and recovered if messages don't arrive intact at the receiving application. D. The Presentation layer is responsible for transporting Application layer payloads from one application to another.

True

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

A. Application

In the TCP/IP model, what layer combines the responsibilities of the Application, Presentation, and Session layers from the OSI model? A. Application B. Internet C. Transport D. Link

False

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

False

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

A. MAC (Media Access Control) address

The frame header at the Data Link layer includes hardware addresses of the source and destination NICs. What is another name for this address? A. MAC (Media Access Control) address B. DAC (Data Access Control) address C. DAC (Digital Access Control) address D. PAC (Packet Access Control) address

True

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. True False

False

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

True

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

B. star topology

If your network consists of all connected devices connecting to one central device, such as a switch, what type of topology is being used? A. bus topology B. star topology C. star bus topology D. mesh topology

D. The packet will be divided into smaller packets using fragmentation.

What occurs if a network layer protocol is aware that a packet is larger than the maximum size for its network? A. The protocol will notify a network router capable of receiving the packet, and a new path will be used to the destination. B. The protocol will send an ICMP message to the destination, requesting a larger packet size be allowed. C. The packet will be dropped silently, requiring the communicating application try again. D. The packet will be divided into smaller packets using fragmentation.