You plan to use a network firewall to protect computers at a small office.
For each statement about firewalls, select True or False.
Note: You will receive partial credit for each correct selection.

Correct Answer:

Explanation:
* A firewall can direct all web traffic to a specific IP address.
* True: Firewalls can be configured to perform Network Address Translation (NAT) and port forwarding, which can direct all web traffic (typically on port 80 and 443) to a specific internal IP address.
* A firewall can block traffic to specific ports on internal computers.
* True: Firewalls can be configured with access control lists (ACLs) or rules to block traffic to specific ports on internal computers, enhancing security by restricting unwanted or harmful traffic.
* A firewall can prevent specific apps from running on a computer.
* False: Firewalls typically control traffic flow and do not prevent specific applications from running on a computer. Application control is usually managed by endpoint security software or application control systems.
* Directing Web Traffic: Firewalls can manage traffic redirection using NAT and port forwarding rules to route web traffic to designated servers or devices within the network.
* Blocking Specific Ports: Firewalls can enforce security policies by blocking or allowing traffic based on port numbers, ensuring that only permitted traffic reaches internal systems.
* Application Control: While firewalls manage network traffic, preventing applications from running typically requires software specifically designed for endpoint protection and application management.
References:
* Understanding Firewalls: Firewall Capabilities
* Network Security Best Practices: Network Security Guide

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A user reports that a company website is not available. The help desk technician issues a tracert command to determine if the server hosting the website is reachable over the network. The output of the command is shown as follows:

What can you tell from the command output?

• A.The router at hop 3 is not forwarding packets to the IP address 192.168.1.10.
• B.The server address 192.168.1.10 is being blocked by a firewall on the router at hop 3.
• C.The server with the address 192.168.1.10 is reachable over the network.
• D.Requests to the web server at 192.168.1.10 are being delayed and time out.

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A Cisco PoE switch is shown in the following image. Which type of port will provide both data connectivity and power to an IP phone?

• A.Port identified with number 2
• B.Ports identified with numbers 3 and 4
• C.Ports identified with number 6
• D.Ports identified with number 7

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You want to list the IPv4 addresses associated with the host name www.companypro.net.
Complete the command by selecting the correct option from each drop-down list.

Correct Answer:

Explanation:
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the following command:
nslookup www.companypro.net
This command will query the DNS servers to find the IP address associated with the hostname provided.If you want to ensure that it returns the IPv4 address, you can specify the-type=Aoption, which stands for Address records that hold IPv4 addresses1. However, thenslookupcommand by default should return the IPv4 address if available.
To list the IPv4 addresses associated with the host namewww.companypro.net, you should use thenslookup command.
* Command: nslookup
* Target:www.companypro.net
So, the completed command is:
* nslookupwww.companypro.net
* nslookup: This command is used to query the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record.
* www.companypro.net: This is the domain name you want to query to obtain its associated IP addresses.
References:
* Using nslookup: nslookup Command Guide

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A user reports that a company website is not available. The help desk technician issues a tracert command to determine if the server hosting the website isreachable over the network. The output of the command is shown as follows:

What can you tell from the command output?

• A.The router at hop 3 is not forwarding packets to the IP address 192.168.1.10.
• B.The server address 192.168.1.10 is being blocked by a firewall on the router at hop 3.
• C.The server with the address 192.168.1.10 is reachable over the network.
• D.Requests to the web server at 192.168.1.10 are being delayed and time out.

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