Domain 1 Network+ Review Questions

Front

ON which layer of the OSI model does encryption and decryption occur?

Back

Presentation

Answer explanation

The presentation layer is responsible for encryption and decryption services. The presentation layer is also responsible for compression and decompression and translation services.

Front

Which layer in the OSI model provides framing of data?

Back

Data Link

Answer explanation

The Data Link layer provides the framing of data for transmission on the physical media. The application layer is where APIs exist, and it also serves the layer that communicates with the user.

Front

What is the proper protocol data unit for data at the Application layer?

Back

User datagrams

Answer explanation

The proper protocol data unit (PDU) for data at the application layer is user datagrams. The bits PDU is used to describe data at the physical layer. The segments PDU is used to describe data at the Transport layer. The frames PDU is used to describe data at the Data Link layer

Front

Which connectivity method is locally owned, managed by an organization and used to connect the organization's LAN together?

Back

CAN

Answer explanation

A campus area network (CAN) is a connectivity method that is locally owned and managed by an organization to connect multiple LANs together.

Front

Which network topology design has a centralized switch connecting all of the devices?

Back

Star Topology

Answer explanation

A star topology has a centralized switch connecting all of the devices outward like a star.

Front

Which is a direct benefit of a full mesh topology? Options: Increased bandwidth, Increased redundancy, Decreased switch count, Increased complexity

Back

Increased redundancy

Answer explanation

Increased redundancy of connections is a direct benefit of a full mesh topology.

Front

Which core diameter is commonly associated with single-mode fiber-optic cabling?

Back

9 microns

Answer explanation

The core of a single-mode fiber-optic cable is normally 9 microns in diameter. A core of 50 microns describes a multimode fiber-optic cable.

Front

Which transceiver type allows for the connection of up to four different devices from one transceiver?

Back

QSPF+

Answer explanation

A Quad Small Form-factor Pluggable+ (QSPF+) can connect up to 4 different devices from one transceiver with the use of a breakout style cable.

Front

What is the functional purpose of an APC fiber-optic connection end?

Back

Minimized reflection loss

Answer explanation

An angled physical contact (APC) fiber-optic connection end is used to minimize reflection loss of the original light signal.

Front

Which cabling standard was the first to support 10 Gbps data speeds?

Back

Category 6

Answer explanation

Category 6 was the first to support 10 Gbps at a maximum length of 55 meters.