Hardware Devices Links Multiple Networks Practice Questions

Practice Questions Score: 100% Question 1: Which of the following hardware devices links multiple networks and directs traffic between networks? Correct Answer: Router Incorrect Answer: Hub Incorrect Answer: Repeater Incorrect Answer: Bridge EXPLAN ATION A router is a device that links multiple networks and directs traffic between networks. Each network linked by routers has its own unique identifier called the network number or network address. Question 2: You are the network administrator for a small organization. Recently, you contracted with an ISP to connect your organization's network to the internet to provide users with internet access. Since doing so, it has come to your attention that an intruder has invaded your network from the internet on three separate occasions. What type of network hardware should you implement to prevent this from happening again? Correct Answer: Firewall Incorrect Answer: Switch Incorrect Answer: Hub Incorrect Answer: CSU/DSU Incorrect Answer: Router Incorrect Answer: Proxy server EXPLAN ATION The role of a firewall is to provide a barrier between an organization's network and a public network, such as the internet. Its job is to prevent unauthorized access into the organization's private network. To do this, the firewall examines incoming packets and determines whether they should be allowed to enter based on a set of rules defined by the network administrator. Question 3: Which of the following is the best device to deploy if you want to protect your private network from a public untrusted network? Incorrect Answer: Incorrect Answer: Correct Answer: Incorrect Answer: Hub Router Firewall Gateway EXPLAN ATION A firewall is the best device to deploy if you want to protect your private network from a public untrusted network. Firewalls are used to control traffic entering and leaving your trusted network environment. Firewalls can manage traffic based on source or destination IP address, port number, service protocol, application or service type, user account, and even traffic content. Routers offer some packet-based access control, but it is not as extensive as what a full-fledged firewall provides. Hubs and gateways are not sufficient for managing the interface between a trusted and an untrusted network. Question 4: Which of the following is a good reason to install a firewall? Incorrect Answer: Correct Answer: To cache web pages. To prevent hackers from accessing your network. Incorrect Answer: To limit public access to just your DHCP server instead of your whole network. Incorrect Answer: network. To translate between internet IP addresses and the IP addresses on your private EXPLAN ATION Firewalls prevent unauthorized users from accessing private networks connected to the internet. You should never allow public access to your DHCP server. A proxy server caches web pages. A NAT router or ICS translates web addresses to private IP addresses. A proxy server and NAT software might be implemented on the same device as your firewall, but they are different concepts. Question 5: You are the administrator of your company's network. You want to prevent unauthorized access to your intranet from the internet. Which of the following should you implement? Correct Answer: Firewall Incorrect Answer: Packet Internet Groper Incorrect Answer: ICS Incorrect Answer: Proxy server EXPLAN ATION A firewall allows you to filter unwanted traffic from the internet to your network. Packet internet groper is better known by its acronym, PING, a TCP/IP command. A proxy server caches web pages. ICS allows you to connect a small network to the internet through a single connection.