Mod1

A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber optic cable that connects two of the existing dormitories to the campus data center. Although the cable has been cut, students in the dormitories only experience a very short interruption of network services. What characteristic of the network is shown here?

• quality of service (QoS)
• scalability
• security
• fault tolerance
• integrity

Answer explanation

Fault tolerance is the characteristic of a network which allows it to quickly respond to failures of network devices, media, or services. Quality of service refers to the measures taken to ensure that network traffic requiring higher throughput receives the required network resources. Scalability refers to the ability of the network to grow to accommodate new requirements. Security refers to protecting networks and data from theft, alteration, or destruction. Integrity refers to the completeness of something and is generally not used as a characteristic of networks in the same way as the other terms.

A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?

• cloud computing
• online collaboration
• bring your own device
• video conferencing

Answer explanation

BYOD allows end users to use personal tools to access the corporate network. Allowing this trend can have major impacts on a network, such as security and compatibility with corporate software and devices.

An employee wants to access the network of the organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network?

• ACL
• IPS
• VPN
• BYOD

Answer explanation

Virtual private networks (VPN) are used to provide secure access to remote workers.

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

• fault tolerance
• Scalability
• QoS
• Security

Answer explanation

Confidentiality, integrity, and availability are requirements of security.

During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. Which type of threat is affecting this computer?

• DoS attack
• identity theft
• spyware
• zero-day attack

Answer explanation

Spyware is software that is installed on a network device and that collects information.

Having multiple paths to a destination is known as redundancy. This is an example of which characteristic of network architecture?

• fault tolerance
• Scalability
• QoS
• Security

Answer explanation

Redundancy is an example a fault-tolerant network architecture.

How does BYOD change the way in which businesses implement networks?

• BYOD requires organizations to purchase laptops rather than desktops.
• BYOD users are responsible for their own network security, thus reducing the need for organizational security policies.
• BYOD devices are more expensive than devices that are purchased by an organization.
• BYOD provides flexibility in where and how users can access network resources.

Answer explanation

Reference Topic 1.8.0.A BYOD environment requires an organization to accommodate a variety of devices and access methods. Personal devices, which are not under company control, may be involved, so security is critical. Onsite hardware costs will be reduced, allowing a business to focus on delivering collaboration tools and other software to BYOD users.

In which scenario would the use of a WISP be recommended?

• an Internet cafe in a city
• a farm in a rural area without wired broadband access
• any home with multiple wireless devices
• an apartment in a building with cable access to the Internet

Answer explanation

Wireless Internet Service Providers (WISPs) are typically found in rural areas where DSL or cable access is not available. A dish or antenna on the property of the subscriber connects wirelessly to a WISP transmitter, eliminating the need for physical cabling outside the building.

What are two characteristics of a scalable network? (Choose two.)

• easily overloaded with increased traffic
• grows in size without impacting existing users
• is not as reliable as a small network
• suitable for modular devices that allow for expansion
• offers limited number of applications

Answer explanation

Scalable networks are networks that can grow without requiring costly replacement of existing network devices. One way to make a network scalable is to buy networking devices that are modular.

What are two functions of end devices on a network? (Choose two.)

• They originate the data that flows through the network.
• They direct data over alternate paths in the event of link failures.
• They filter the flow of data to enhance security.
• They are the interface between humans and the communication network.
• They provide the channel over which the network message travels.

Answer explanation

End devices originate the data that flows through the network. Intermediary devices direct data over alternate paths in the event of link failures and filter the flow of data to enhance security. Network media provide the channel through which network messages travel.