CISCO M1 - Networking Today (Module 1)

Which of the following is the name for all computers connected to a network that participate directly in network communications

• servers

• intermediary devices

• hosts

• media

Answer explanation

All computers that are connected to a network and participate directly in network communication are classified as hosts.

Hosts can be called end devices. Some hosts are also called clients.

However, the term hosts specifically refers to devices on the network that are assigned a number for communication purposes.

When data is encoded as pulses of light, which media is being used to transmit the data?

• wireless

• fiber-optic cable

• copper cable

• multilayer switch

Answer explanation

Modern networks primarily use three types of media to interconnect devices:

1. Metal wires within cables - Data is encoded into electrical impulses.

2. Glass or plastic fibers within cables (fiber-optic cable) - Data is encoded into pulses of light.

3. Wireless transmission - Data is encoded via modulation of specific frequencies of electromagnetic waves.

Which two devices are intermediary devices? (Choose two)

• hosts

• routers

• servers

• switches

Answer explanation

Intermediary devices connect the individual end devices to the network. They can connect multiple individual networks to form an internetwork.

These intermediary devices provide connectivity and ensure that data flows across the network.

Which connection physically connects the end device to the network?

• Port

• NIC

• Interface

Answer explanation

A diagram provides an easy way to understand how devices connect in a large network. This type of “picture” of a network is known as a topology diagram.

The ability to recognize the logical representations of the physical networking components is critical to being able to visualize the organization and operation of a network.

In addition to these representations, specialized terminology is used to describe how each of these devices and media connect to each other:

1. Network Interface Card (NIC) - A NIC physically connects the end device to the network.

2. Physical Port - A connector or outlet on a networking device where the media connects to an end device or another networking device.

3. Interface - Specialized ports on a networking device that connect to individual networks. Because routers connect networks, the ports on a router are referred to as network interfaces.

Which connections are specialized ports on a networking device that connect to individual networks?

• Port

• NIC

• Interface

Answer explanation

A diagram provides an easy way to understand how devices connect in a large network. This type of “picture” of a network is known as a topology diagram.

The ability to recognize the logical representations of the physical networking components is critical to being able to visualize the organization and operation of a network.

In addition to these representations, specialized terminology is used to describe how each of these devices and media connect to each other:

1. Network Interface Card (NIC) - A NIC physically connects the end device to the network.

2. Physical Port - A connector or outlet on a networking device where the media connects to an end device or another networking device.

3. Interface - Specialized ports on a networking device that connect to individual networks. Because routers connect networks, the ports on a router are referred to as network interfaces.

Which network infrastructure provides access to users and end devices in a small geographical area, which is typically a network in a department in an enterprise, home or small business?

• Extranet

• Intranet

• LAN

• WAN

Answer explanation

A LAN is a network infrastructure that spans a small geographical area. LANs have specific characteristics:

- LANs interconnect end devices in a limited area such as a home, school, office building, or campus.

-A LAN is usually administered by a single organization or individual. Administrative control is enforced at the network level and governs the security and access control policies.

-LANs provide high-speed bandwidth to internal end devices and intermediary devices, as shown in the figure.

Which network infrastructure might an organization use to provide secure and safe access to individuals who work for a different organization but require access to the organization's data?

• Extranet

• Intranet

• LAN

• WAN

Answer explanation

An organization may use an extranet to provide secure and safe access to individuals who work for a different organization but require access to the organization’s data.

Which network infrastructure provides access to other networks over a large geographical area, which is often owned and managed by a telecommunications service provider?

• Extranet

• Intranet

• LAN

• WAN

Answer explanation

A WAN is a network infrastructure that spans a wide geographical area. WANs are typically managed by service providers (SPs) or Internet Service Providers (ISPs).

WANs have specific characteristics:

-WANs interconnect LANs over wide geographical areas such as between cities, states, provinces, countries, or continents.

-WANs are usually administered by multiple service providers.

WANs typically provide slower speed links between LANs.

When designers follow accepted standards and protocols, which of the four basic characteristics of network architecture is achieved?

• Fault tolerance

• Scalability

• QoS

• Security

Answer explanation

A scalable network expands quickly to support new users and applications.

It does this without degrading the performance of services that are being accessed by existing users.

Confidentiality, integrity, and availability are requirements of which of the four basic characteristics of network architecture?

• Fault tolerance

• Scalability

• QoS

• Security

Answer explanation

Network administrators must also protect the information contained within the packets being transmitted over the network, and the information stored on network attached devices. In order to achieve the goals of network security, there are three primary requirements.

1. Confidentiality - Data confidentiality means that only the intended and authorized recipients can access and read data.

2. Integrity - Data integrity assures users that the information has not been altered in transmission, from origin to destination.

3. Availability - Data availability assures users of timely and reliable access to data services for authorized users.