CCNA 3 F1

Which design feature will limit the size of a failure domain in an enterprise network?

• the purchase of enterprise equipment that is designed for large traffic volume

• the installation of redundant power supplies

• the use of a collapsed core design

• the use of the building switch block approach

Answer explanation

Explanation: In order to best limit the of a failure domain, routers or multilayer switches can be deployed in pairs. The failure of a single device should not cause the network to go down. Installing redundant power supplies may protect a single device from a power failure, but if that device suffers from another type of problem, a redundant device would have been a better solution. Purchasing enterprise equipment that handles large flows of traffic will not provide extra reliability in times of an outage. If a collapsed core design is used, the core and distribution are collapsed into a single device, increasing the chance of a devastating outage.

Which two things should a network administrator modify on a router to perform password recovery? (Choose two.)

• the system image file

• the NVRAM file system

• the configuration register value

• the startup configuration file

• system ROM

Answer explanation

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What type of network uses one common infrastructure to carry voice, data, and video signals?

• borderless

• converged

• managed

• switched

Answer explanation

Explanation: A converged network has only one physical network to install and manage. This results in substantial savings over the installation and management of separate voice, video, and data networks.

What are three advantages of using private IP addresses and NAT? (Choose three.)

• hides private LAN addressing from outside devices that are connected to the Internet

• permits LAN expansion without additional public IP addresses

• reduces CPU usage on customer routers

• creates multiple public IP addresses

• conserves registered public IP addresses

Answer explanation

Explanation: Private IP addresses are designed to be exclusively used for internal networks and they cannot be used on the Internet. Thus they are not visible directly from the Internet and they can be used freely by network administrators for internal networks. In order for the internal hosts to access the Internet, NAT is used to translate between private and public IP addresses. NAT takes an internal private IP address and translates it to a global public IP address before the packet is forwarded.

Which two scenarios are examples of remote access VPNs? (Choose two.)

• All users at a large branch office can access company resources through a single VPN connection.

• A small branch office with three employees has a Cisco ASA that is used to create a VPN connection to the HQ.

• A toy manufacturer has a permanent VPN connection to one of its parts suppliers.

• A mobile sales agent is connecting to the company network via the Internet connection at a hotel.

• An employee who is working from home uses VPN client software on a laptop in order to connect to the company network.

Answer explanation

Explanation: Remote access VPNs connect individual users to another network via a VPN client that is installed on the user device. Site-to-site VPNs are “always on” connections that use VPN gateways to connect two sites together. Users at each site can access the network on the other site without having to use any special clients or configurations on their individual devices.

What are three benefits of cloud computing? (Choose three.)

• It utilizes end-user clients to do a substantial amount of data preprocessing and storage.

• It uses open-source software for distributed processing of large datasets.

• It streamlines the IT operations of an organization by subscribing only to needed services.

• It enables access to organizational data anywhere and at any time.

• It eliminates or reduces the need for onsite IT equipment, maintenance, and management.

Answer explanation

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What is a characteristic of a single-area OSPF network?

• All routers share a common forwarding database.

• All routers have the same neighbor table.

• All routers are in the backbone area.

• All routers have the same routing table.

Answer explanation

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What is a WAN?

• a network infrastructure that spans a limited physical area such as a city

• a network infrastructure that provides access to other networks over a large geographic area

• a network infrastructure that provides access in a small geographic area

• a network infrastructure designed to provide data storage, retrieval, and replication

Answer explanation

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A network administrator has been tasked with creating a disaster recovery plan. As part of this plan, the administrator is looking for a backup site for all of the data on the company servers. What service or technology would support this requirement?

• data center

• virtualization

• dedicated servers

• software defined networking

Answer explanation

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Which type of OSPF packet is used by a router to discover neighbor routers and establish neighbor adjacency?

• link-state update

• hello

• database description

• link-state request

Answer explanation

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