CompTIA A+ 220-1101 (Core 1) Domain 2: Networking

A switch maintains a table of MAC addresses by port and forwards network data packets to only the port that matches the MAC address. This significantly reduces collisions.

A technician determines that an older network hub that connects 24 workstations is performing poorly due to excessive network collisions. Which of the following network devices would be the BEST replacement?

The Windows proprietary network protocol that allows the technician to open a graphical interface to connect with the user's Windows computer is Remote Desktop Protocol (RDP). By default, RDP uses port 3389.

To assist a user, a help desk technician is able to take advantage of a Windows proprietary network protocol that allows the technician to open a graphical interface to connect with the user's Windows computer. Which of the following TCP/IP port numbers is the default port used by this protocol?

Routers are used to connect multiple networks together. When sending data in between networks, the router is responsible for forwarding the data to the proper network.

Which device is responsible for forwarding traffic in between networks?

It connects multiple cable segments or hosts and forwards data packets to the appropriate host.

Which of the following BEST describes how a switch functions?

A hub and a repeater send received signals out all other ports. These devices do not examine the frame or packet contents

Which of the following hardware devices regenerates a signal out to all connected ports without examining the frame or packet contents?

The maximum ranges for Bluetooth versions include the following: Version 1.0 - 10 meters Versions 2.0 and 3.0 - 30 meters Version 4.0 - 60 meters Version 5.0 - 240 meters

Which of the following is the maximum range of the Bluetooth 2.0 specification?

An Ethernet patch panel typically terminates wires that run from different Ethernet office wall plates.

You are in the process of setting up an Ethernet network for a new building at your company's headquarters. You need to connect the wires from the different Ethernet office wall plates to your network rack. Which of the following components on the network rack should you use to connect the wires from the office wall plates?

FTP (File Transfer Protocol)

You want to allow your users to download files from a server running the IP protocol. You also want to protect access to the files by requiring user authentication to access specific directories on the server. Which IP protocol should you implement to provide this capability?

DNS

You want to implement name resolution on the Linux workstations in your company. Which protocol should you use to do this?

Server Message Block (SMB) is used by Windows systems to access shared resources over the network.

You've used your Windows workstation to map a drive to a shared folder on a Windows server. Which protocol was used to access the share?

User Datagram Protocol (UDP) is a Transport layer protocol that uses a simple connectionless communication model with a minimal protocol mechanism. This makes it suitable for streaming video or sound. Guaranteed data delivery is not as important as fast transmissions.

A company has built a video streaming service that supplies training videos. Quickly transmitting video data to customers is more important than guaranteed delivery. Which of the following Transport layer IP suite protocols is MOST likely used for this service?

Both POP3 and IMAP can be used to retrieve email messages from an email server.

A user is configuring an email client application and plans to use a standard TCP/IP suite protocol to retrieve email messages from an email server. Which of the following TCP/IP suite protocols can be used to retrieve email messages? (Select two.)

Ports 20 and 21

An administrator configures a server to run the TCP/IP suite protocol that allows users to download files contained in specific directories on the server and also protects access to those files by requiring user authentication. Which of the following TCP/IP port numbers allow this protocol to work properly? (Select two.)

When a data packet enters a port, the source MAC address is copied from the data packet header.

How do switches and bridges learn where devices are located on a network?

Port 22: Secure Shell (SSH) Port 80: HyperText Transfer Protocol (HTTP) Port 443: HyperText Transfer Protocol Secure (HTTPS) Port 445: Server Message Block (SMB/CIFS) directly over TCP Port 143: Internet Message Access Protocol (IMAP)

Secure Shell (SSH) HyperText Transfer Protocol Secure (HTTPS) HyperText Transfer Protocol (HTTP) Server Message Block (SMB/CIFS) directly over TCP Internet Message Access Protocol (IMAP)

A wide area network (WAN) is connected to the router using a small form-factor pluggable (SFP) connector.

The router below provides several ports for connecting two or more network segments or subnets. The port circled in red is a small form-factor pluggable (SFP) connector. Which type of network can connect to this port?

When using TCP, two hosts first establish a connection through a three-way handshake. This handshake process is established in the following order: The first host sends a SYN packet asking to create a new session. The receiving host replies with a SYN-ACK packet acknowledging that the session can be created. The first host replies with the ACK packet, which then opens the session.

When using TCP, two hosts first establish a connection through a three-way handshake. What are the steps?

Each packet contains a packet header, which is a special label that defines the sender, receiver, and data chunk order.

Which of the following items of information does a packet header contain? (Select three.)

53 (DNS)

You've just installed the DNS service on a Windows server. Which port must be opened on the server's firewall to allow clients to access the service?

Dynamic Host Configuration Protocol (DHCP)

A technician has configured a client computer's network interface to request an IP address. Which of the following TCP/IP suite protocols does the client computer use to perform the request and receive an IP address from a server?

Domain Name System (DNS)

A technician has configured a client computer's network interface with server addresses to which the client will send requests for translating fully qualified domain names (FQDNs) to IP addresses and IP addresses to FQDNs. Which of the following TCP/IP suite protocols is used by the client to perform the request and also used by a server to respond to those requests?

The TCP/IP suite protocol that stores email messages on a server so that they can be synchronized across multiple devices is Internet Message Access Protocol (IMAP). IMAP typically uses port 143.

A user is configuring an email client application and decides to use a TCP/IP suite protocol that stores all messages on the email server so that they can be synchronized across a laptop, a smartphone, and a web email client. In addition, this protocol stores the email messages on the email server until the user explicitly deletes them. Which of the following TCP/IP port numbers will the client application typically access while using this protocol to contact the email server?

PoE+ Power over Ethernet(which can use Mode A or Mode B) provides a maximum of 30 watts of power, which is designed for use with devices like biometric sensors and tablets.

Currently, your company is in the process of upgrading security in the company headquarters building by installing biometric sensors to limit access to specific rooms. Your network switches are PoE-enabled, which allows biometric sensors to connect to switches without an external power source. Which of the following PoE standards is designed for use with biometric sensors?

Class 3 devices transmit up to 1 meter. Class 2 devices transmit up to 10 meters. Class 1 devices transmit up to 100 meters.

Up to 100 meters for Class 1 devices. Correct Answer: Bluetooth Up to 2 meters with a few obstacles in between. Correct Answer: Infrared Up to 10 meters for Class 2 devices. Correct Answer: Bluetooth A few centimeters. Correct Answer: Near Field Communcation

Networking protocols define how the data is formatted and transmitted. If devices are not using the same protocol then they will be unable to communicate.

What are the standards called that define how data is formatted and transmitted over a network?

A switch offers guaranteed bandwidth to each port, unlike a hub, which shares bandwidth among all the network ports.

Which of the following LAN devices receives a signal on one port and forwards that signal only to the port where the destination device is connected?

Bluetooth is a wireless networking standard that uses 2.4 GHz radio waves. Bluetooth devices communicate using what is called a personal area network (PAN), which is similar to an ad hoc wireless network.

Which of the following are technologies that Bluetooth utilizes? (Select two.)

Software-defined networking (SDN) consists of a specialized controller that can remotely manage all network devices.

Which of the following is a specialized controller that you can use to remotely manage all your network devices?

Bluetooth v3 and v4 devices have a maximum transmission speed of 24 Mbps when using High Speed (HS) mode. Bluetooth v1 devices have a maximum transmission speed of 1 Mbps. Bluetooth v2 devices have a maximum transmission speed of 3 Mbps. Bluetooth v5 devices have a maximum transmission speed of 48 Mbps when using High Speed (HS) transmission mode.

Which of the following is the maximum transmission speed for Bluetooth v3 and v4 devices when using High Speed (HS) mode?

Other wireless transmitting devices (such as cordless phones or microwaves) and generators cause interference for wireless access points

Which of the following locations will contribute the greatest amount of interference to a wireless access point? (Select two.)

The network interface (NIC) converts the digital data into a signal that can be transmitted along the transmission medium.

Which of the following network components is responsible for converting digital data into a signal that can be transmitted?

POP3 is part of the IP protocol suite and is used to retrieve email from a remote server to a local client over a network connection.

Which of the following protocols do email clients use to download messages from a remote mail server?

NetBIOS is a non-routable protocol. It is often combined with IPX or IP to enable internetwork communications. NetBIOS was used in earlier versions of Windows but is rarely used today because nearly every operating system supports IP.

Which of the following protocols is non-routable and requires another protocol to enable internetwork communications?

TCP is most often combined with Internet Protocol (IP) to send data across the internet. IP is responsible for determining how to deliver the data between two hosts, and TCP is responsible for the segmenting and sequencing of the data packets.

Which of the following protocols is often combined with TCP to send data across the internet?

IMAP allows a mail server to keep a copy of a user's messages on the server after they're downloaded to the mail client.

Which of the following protocols is used by an email client to retrieve messages from an email server, giving users the option to keep mail messages on the server?

A Windows system firewall must be configured to allow Remote Desktop traffic through. This is done by opening TCP port 3389 (by default). This port is opened automatically on the Remote Desktop host when remote connections are enabled.

Which port must be opened on the firewall of a Windows system so that a Remote Desktop connection can be established?

SMTP (Simple Mail Transfer Protocol)

Which protocol is used to send email messages from a mail client to a mail server?

HTTPS and HTTP

Which protocols are used on the internet to transmit web pages from web servers to web browsers running on client workstations? (Select two.)

MIMO (multiple-input, multiple-output) increases bandwidth by using multiple antennae for both the transmitter and receiver

Which type of wireless technology increases bandwidth for a home wireless network by using multiple antennae for both the transmitter and receiver?

The TCP/IP suite protocol web browsers use for encrypted communications is HTTPS. HTTPS typically uses port 443.

While making an online bank transaction, a customer checks to see that the web browser is displaying a lock icon that indicates that an encrypted TCP/IP suite protocol is being used. Which of the following TCP/IP port numbers does this protocol typically use when the browser encrypts its communications with the bank's web server?

Remote Desk Protocol (RDP) runs on port 3389 by default

While working on a Windows workstation, you enable Remote Desktop. Which of the following ports MUST be open on the server's firewall to allow remote clients to access the desktop through Remote Desktop?

User Datagram Protocol (UDP) can be used with IP to create unacknowledged connections between the server application and its clients. Because the packets are sent unacknowledged, latency is dramatically reduced, providing better streaming performance.

You are a software developer, and you're creating a multimedia streaming application. Data will be streamed from your streaming server to clients over IP networks. Which transport protocol should your application use to send data between the clients and the server?

An Ethernet router is a device that connects two or more network segments or subnets. This would meet your networking needs.

You are assembling components in a network rack and need a device that connects three network segments. Which of the following devices will meet your networking needs?

All network ports in a building terminate at a patch panel. The Ethernet cables are punched down and terminate on the backside of the patch panel.

You are using a patch panel to connect the computers in your building to the appropriate switches, and you need to connect the Ethernet wires from the building network port cables to the patch panel. Where do you connect the wires on a patch panel?

A router is an advanced networking device that connects two networks together. When network traffic needs to leave the internal network, it is always sent to the router and then forwarded on to its destination. All external traffic flows through a router.

You want to connect your internal network to an external network in order to provide internet access to your employees. Which of the following network components is designed to make this type of connection?

Bluetooth is the best choice because Bluetooth has a high transfer rate and because it automatically detects other Bluetooth devices in the area and creates an encrypted PAN between them.

You want to use a wireless keyboard and mouse with your laptop computer. Which method could you utilize for the wireless connection?