A+ 1101 PM A 27 - 46

A network administrator is troubleshooting a network outage, and she believes the issue is related to a bad switch. The old switch is then replaced with a newer model and the cabling is moved to the new switch.

Which of the following should be the NEXT troubleshooting steps? (Choose up to TWO)

• Test the theory

• Verify full system functionality

• Establish a plan of action

• Identify the problem

Answer explanation

The Answers: B. Verify full system functionality, and 

                                E. Document the findings

Once the theory has been tested, a plan of action has been determined, and the plan has been implemented, it's important to verify that full system functionality has been restored. After all of this work, it's useful to document the problem, the proposed solutions, and the ultimate fix. This problem might occur again, and it would be useful to have documentation on the issue.

The incorrect answers:

A. Test the theory

The testing of possible theories should occur before making any changes. In this example, the replacement of the switch is the theory tested in the lab prior to implementation.

C.   Establish a plan of action

The plan of action was created prior to the replacement of the switch. The plan design might be relatively simple or may have a complex set of processes. The complexity of the plan generally depends on the organization and the type of problem.

D.   Identify the problem

Identifying the problem is the first step in the troubleshooting process. Before you can resolve an issue, it's important to fully understand what might not be working.

More information:

220-1101, Objective 5.1 - How to Troubleshoot https://professormesser.link/1101050101

A newly installed MFD provides an option to "scan to SMB." Which of the following would BEST describe this feature?

• Print jobs can be sent from mobile devices

• All scans are checked for malware

• Files are stored on a Microsoft share

• Documents are scanned from the cloud

Answer explanation

The Answer: C. Files are stored on a Microsoft share

SMB (Server Message Block) is the protocol used by Microsoft operating systems to share files, print jobs, and other information between other Microsoft OS devices. Many MFDs (Multifunction Devices) can scan a document and store the scanned file on a central network share  using SMB.

The incorrect answers:

A.  Print jobs can be sent from mobile devices

Many mobile devices can send jobs to a local printer, but this feature isn't part of the scanning process.

B.  All scans are checked for malware

Although it's important to protect against all sources of malware, it would be unusual for a newly scanned document on a local MFD to contain any malicious software.

D. Documents are scanned from the cloud

Many MFDs can support input from different sources, but the scan to SMB feature describes the location of the output file once the original document has been scanned.

More information:

220-1101, Objective 3.6 - Multifunction Devices https://professormesser.link/1101030601

What type of device connects multiple computers to the network, but becomes less efficient as network traffic increases?

• Switch

• Hub

• Repeater

• Router

Answer explanation

The Answer: B. Hub

A hub operates as a multi-port repeater, where incoming traffic is repeated to every other port in the hub. If more than one device attempts to communicate at the same time, these conflicting signals are called a collision. Each time a collision occurs, the sending devices have to stop transmitting, wait a random amount of time, and try sending the traffic again. If many devices are sending large amounts of data, the overall network efficiency will decrease as the number of collisions increase.

The incorrect answers:

A. Switch

A switch makes forwarding decisions based on destination MAC (Media Access Control) address and can communicate over full-duplex links. This full-duplex communication ensures that no collisions will occur.

C.   Repeater

The relatively simple forwarding process of a repeater ensures that slowdowns will not occur as network traffic increases.

D.   Router

Routers forward traffic based on the destination IP address, and this process does not create an inefficiency as the network traffic increases.

More information:

220-1101, Objective 2.2 - Network Devices https://professormesser.link/1101020201

In which of the following would a Lightning cable MOST likely be used?

• Connect a server to a display monitor

• Increase the available memory of a device

• Remotely control a mobile device

• Charge a mobile device

Answer explanation

The Answer: D. Charge a mobile device

The Lightning interface is a proprietary interface used exclusively on mobile devices from Apple. The Lightning interface is a common connection for data transfers and power charging for many Apple mobile devices.

The incorrect answers:

A.  Connect a server to a display monitor

Although there are video output adapters available for Lightning connectors, these options tend to be used exclusively for Apple's phones and tablets and are not commonly used on standalone computers  or servers.

B.  Increase the available memory of a device

Although there are options to provide external storage using a lightning connection, the memory used in an Apple mobile device is limited to the installed internal RAM (Random Access Memory).

C.  Remotely control a mobile device

Although there are remote control options available for Apple devices, these solutions use an existing network connection and do not use the Lightning interface.

More information:

220-1101, Objective 3.1 - Copper Connectors https://professormesser.link/1101030110

A network administrator would like to enable DHCP on a laptop, but they would like the same IP address to be assigned to the laptop each time it starts. Which of the following would provide this functionality?

• Create an IP reservation on the DHCP server

• Administratively configure the laptop’s MAC address

• Use APIPA addressing

• Assign the laptop to a static IP

Answer explanation

The Answer: A. Create an IP reservation on the DHCP server A DHCP (Dynamic Host Configuration Protocol) server will automatically assign IP (Internet Protocol) addresses to devices on the network from an available pool. This means that the IP address for a device may change over time based on the addresses currently available in the pool. To force the same IP address assignment each time, the network administrator can create an IP reservation in the DHCP server to associate a specific IP address to the MAC (Media Access Control) address of the laptop.

The incorrect answers:

B.   Administratively configure the laptop’s MAC address

The MAC address of a device will rarely need to changed through an  administrative configuration, and administratively configuring the MAC address will not permanently assign a particular IP address.

C.   Use APIPA addressing

APIPA (Automatic Private IP Addressing) can provide limited networking when a DHCP server is not available, but APIPA addressing does not provide any static or permanent IP addressing on a device.

D.   Assign the laptop to a static IP VLAN

VLANs (Virtual Local Area Networks) are commonly used to segment the network into individual broadcast domains. Assigning a device to a particular VLAN does not provide a method of static or permanent IP addressing on a device.

More information:

220-1101, Objective 2.6 - DHCP Configuration https://professormesser.link/1101020602

A user is complaining about slow network performance from their workstation. A network technician checks the data closet and finds the wires are not properly seated in the 110 block. Which of the following should the technician use to correct this issue?

• Crimper

• Multimeter

• Punch-down tool

• Cable tester

Answer explanation

The Answer: C. Punch-down tool

A punch-down tool is used to firmly "punch" a wire into a wiring block. These blocks are usually located in a wiring closet or on a patch panel.

The incorrect answers:

A. Crimper

A crimper is used to fasten a modular connector onto the end of a cable. For Ethernet, a crimper attaches the RJ45 connector used by the workstation or laptop.

B. Multimeter

A multimeter can be used to check for voltages or continuity, but it won't connect wires to a 110 block.

D. Cable tester

Cable testers can identify the wire map on a cable to ensure that the punch-down or crimping process has been performed properly. After punching down this connection, the technician could use a cable tester to validate that all of the wires are now properly connected.

More information:

220-1101, Objective 2.8 - Network Tools https://professormesser.link/1101020801

A user has just connected to a new wireless network, but they cannot view any Internet web sites. Their network configuration shows the IP address as 169.254.228.109, the subnet mask is 255.255.0.0, and they have not been assigned a default gateway. Which of these is the MOST likely cause of this issue?

• The subnet mask is not correct

• The Internet provider is experiencing a temporary outage

• The DHCP server is down

• The wireless adapter is not working properly

Answer explanation

The Answer: C. The DHCP server is down

If a DHCP (Dynamic Host Configuration Protocol) server is not responding, the local workstation will configure itself with an APIPA (Automatic Private IP Addressing) address. The usable APIPA addresses range between 169.254.1.0 through 169.254.254.255. An APIPA address is a link-local address, so network communication is limited to the local  IP subnet.

The incorrect answers:

A.  The subnet mask is not correct

The subnet mask has been configured through APIPA, and the mask of 255.255.0.0 is normal for an APIPA configuration. The subnet mask is not the cause of the browsing issues on the workstation.

B.  The Internet provider is experiencing a temporary outageIn this example, the issue is related to the APIPA link-local address assigned to the workstation. Although the Internet provider could potentially be experiencing issues, it would not be the most likely cause of the problem.

D. The wireless adapter is not working properly

The wireless adapter has configured itself and assigned a link-local APIPA address, so it appears that the adapter itself is functional.

More information:

220-1101, Objective 5.7 - Troubleshooting Networks https://professormesser.link/1101050701

A help desk technician needs to use different Windows versions to study for an industry certification exam. The technician currently uses a Windows desktop computer with 4 GB of RAM and a 750 GB free on the hard drive. Which of the following would be the BEST way to perform this task? (Choose up to TWO)

• Install a second monitor

• Install an additional hard drive

• Create a Windows Recovery Environment boot drive

• Upgrade the system RAM

• Install Windows guest VMs

Answer explanation

The Answers: D. Upgrade the system RAM, and

                       E. Install Windows guest VMs

The easiest way to use multiple operating systems on a single machine is to run them as virtual machines. Although 750 GB (Gigabytes) is plenty of storage space for multiple virtual machines, the 4 GB of RAM (Random Access Memory) on the host computer is too small to support multiple Windows operating systems at the same time. Once the memory upgrade is complete, it's a relatively easy process to install the guest virtual machines on the existing hard drive.

The incorrect answers:

A.  Install a second monitor

Multiple monitors can certainly improve overall efficiency and can expand the working desktop of a computer, but it doesn't provide any features specific to multiple operating systems or virtual machines.

B.  Install an additional hard drive

The available hard drive is large enough to support the installation of multiple virtual machines.

C.  Create a Windows Recovery Environment boot drive

A Windows Recovery Environment drive is useful for troubleshooting the existing Windows installation, but it won't help with multiple operating systems.

More information:

220-1101, Objective 4.2 - Client-side Virtualization https://professormesser.link/1101040201

While configuring a new workstation in the lab, one of the engineers recommends using 255.255.255.0. What part of the configuration is this associated with?

• Default gateway

• Subnet mask

• DNS server

• IP address

Answer explanation

The Answer: B. Subnet mask

Subnet masks are used by a device to determine what subnet it's connected to. Subnet masks are a series of binary ones that are used to "mask" the subnet address from the host address. Instead of representing this mask in binary, it's almost always shown in decimal form. Common decimal representations of subnet mask start with 255, such as 255.255.255.0.

The incorrect answers:

A. Default gateway

A default gateway on an internal lab network will most likely be using private IP (Internet Protocol) addressing starting with 10, 172, or a 192. IP addresses cannot start with an octet of 255. Therefore, a default gateway in this environment would not have an IP address of 255.255.255.0.

C.   DNS server

Since an IP address cannot start with the octet of 255, this address would not be associated with a DNS server.

D.   IP address

The IP address of a device cannot start with 255. It's most likely that a device in a lab would use an internal IP address that starts with an octet of 10, 172, or 192.

More information:

220-1101, Objective 2.5 - IPv4 and IPv6 https://professormesser.link/1101020501

Which of the following BEST describes a Bluetooth network?

• PAN

• WAN

• LAN

• MAN

Answer explanation

The Answer: A. PAN

A PAN (Personal Area Network) is designed for a small area and usually is associated with an individual. Bluetooth devices such as headsets, speakers, and automobile connections are considered PANs.

The incorrect answers:

B. WAN

A WAN (Wide Area Network) usually connects locations over an extended geographical distance. A network link between cities, states, or countries would be considered a WAN connection.

C.   LAN

The network in your building or home is a LAN (Local Area Network). If you're connected to an Ethernet or 802.11 wireless network, then you're connected to a LAN.

D.   MAN

A MAN (Metropolitan Area Network) is a bit bigger than a LAN, but smaller than a WAN. Connecting sites in the same city or metropolitan area would commonly use a MAN link.

More information:

220-1101, Objective 2.7 - Network Types https://professormesser.link/1101020702