Chapter 01 Quiz (ITN101) - Network Models

Which layer of the OSI model uses routers and IP addresses to ensure that packets arrive at the correct system?

Which layer of the OSI model uses routers and IP addresses to ensure that packets arrive at the correct system?

Network

Which layer of the OSI model adds sender and recipient MAC addresses to frames?

Data Link

All NICs on the same network must use the same __________, or they will not be able to communicate with other NICs.

frame type

Logic Link Control (LLC) and Media Access Control (MAC) are two parts of which OSI model layer?

Link

Where does the CRC originate in a network frame?

The sending NIC attaches it.

An oscilloscope is a powerful tool that enables a technician to see __________.

Electrical pulses

In which layer of the OSI model are packets created and addressed so they can go from one network to another?

Network

One function of a NIC is to _____.

use the CRC to verify the data within each frame arrived intact

How does the receiving station on a network use the CRC to verify that it received accurate data?

It applies the same math as the sending NIC and checks whether the answer is the same as the CRC.

The Transport layer creates a segment or datagram and hands it down to the Network layer. (T/F)

True

Which layer of the OSI model manages connecting applications to applications?

Session

When a frame arrives at the switch, the switch makes an exact copy of the frame and sends it to every other system on the network. (T/F)

False

Frames in most wired networks hold at most __________.

1500 bytes of data

Which two parts are included in a MAC address?

the Organizationally Unique Identifier (OUI) and the device ID of the NIC

A MAC address is also known as a(n) __________ address.

physical

Which is a broadcast MAC address?

FF-FF-FF-FF-FF-FF

Which statement best describes Logical Link Control (LLC)?

It is an aspect of the NIC that talks to the system's operating system.

What device connects subnets?

router

In a wired network, a charge on a wire represents a zero while no charge represents a one. (T/F)

False

Briefly explain why understanding the OSI model is important.

“Understanding the OSI model is important. It is the primary diagnostic tool for troubleshooting networks and also the communication tool for talking with your fellow techs.”

Which standards organization is named for the Greek word for "equal"?

ISO

Which statement describes an IP address?

It is a unique dotted decimal number assigned to every network device.

TCP is a connectionless protocol. (T/F)

False

What unique numeric identifier is assigned to each device on the network by the IP protocol in the OSI model's Network layer?

IP address

The FCS uses a type of binary math called a cyclic redundancy check (CRC) that the receiving NIC uses to verify that the data arrived intact. (T/F)

True

When a NIC sends a frame that contains the broadcast address, every NIC on the network processes that frame. (T/F)

True

How long is a MAC address?

48 bits

How are incoming frames handled by a switch?

The frames are sent only to the interface associated with the destination MAC address.

Which layer of the OSI model is the only layer divided into two sublayers?

Data Link

Which statement best describes an Application Programming Interface?

It provides programmers with a standard way to extend an application's capabilities.

A number of protocols function on more than one OSI layer. (T/F)

True

Which layer of the OSI model involves the last and most visible part of any network: the software applications that use it?

Application

Which OSI model layer initializes requests for packets that were not received in good order?

Transport

Which layer of the OSI model uses connection-oriented protocols?

Transport

Routers function at which layer of the OSI model?

Network

The NIC is in the Data Link layer and the Physical layer. (T/F)

True

How many layers does the OSI model contain?

7

Which statement describes a capability of routers?

Routers allow network connections across data lines that do not use Ethernet.

Which layer of the OSI model performs IP addressing functions?

Network

A NIC reads the data portion of a frame to determine the address of the receiving system. (T/F)

False

Systems on the same network can share the same IP address. (T/F)

False