Data Comm

In the TCP/IP model, what layer is considered so simple that it is ignored entirely?

• Network

• Application

• Data Link

• Physical

Which of the following is not one of the disadvantages of peer-to-peer networks?

• They are not necessarily secure.

• They are impractical for connecting large numbers of computers.

• They lack scalability.

• They centralize user account logins

In the TCP/IP model, what layer combines the responsibilities of the Application, Presentation, and Session layers from the OSI model?

• Application

• Link

• Transport

• Internet

The TCP and UDP protocols both exist at what layer of the OSI model?

• Application

• Presentation

• Transport

• Network

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

• mesh topology

• star bus topology

• bus topology

• star topology

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

• bit

• frame

• packet

• data

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?

• Transport Layer

• Application Layer

• Session Layer

• Presentation Layer

At the Transport layer of the OSI, what is used to find and communicate with a particular application running on a host?

• port numbers

• MAC addresses

• IP addresses

• domain names

What part of a MAC address serves as the extension identifier, or device ID?

• The last 24 bits of the MAC address.

• The first 24 bits of the MAC address.

• The first 12 bits of the MAC address.

• The last 12 bits of the MAC address.

Which of the following is not a task handled by a router?

• A router forwards broadcasts over the network.

• A router can connect dissimilar networks.

• A router can interpret Layer 3 and often Layer 4 addressing.
  

• A router can reroute traffic if the path of first choice is down but a second path is available.