Class 9 August 2018

The DNS server in the DMZ needs only list a limited number of public IP addresses because its main function is to resolve domain names to IP addresses. It does not perform network address translation (NAT), act as a proxy, or enforce firewall rules. Its primary role is to maintain a database of domain names and their corresponding IP addresses, allowing clients to access websites and other network resources using human-readable names. Therefore, the DNS server does not require a large number of public IP addresses to fulfill its purpose.

A duel-homed host refers to a computer that is equipped with two network interfaces. This allows the computer to connect to two different networks simultaneously, enabling it to act as a bridge or gateway between the two networks. It can facilitate communication and data transfer between the networks, making it a useful tool for network administrators.

The correct answer is "State full firewall and stateless firewall." A network layer firewall is a type of firewall that operates at the network layer of the OSI model. It can be further classified into two sub-categories: stateful firewall and stateless firewall. A stateful firewall keeps track of the state of network connections and can make decisions based on the context of the connection. On the other hand, a stateless firewall does not keep track of the state of network connections and makes decisions based on individual packets.

not-available-via-ai

A firewall is installed at the point where the secure internal network and untrusted external network meet, which is also known as a "choke point". This term refers to a strategic location where the flow of network traffic can be controlled and monitored, allowing the firewall to filter and block potentially harmful or unauthorized data packets. The choke point acts as a barrier between the internal network and the external network, ensuring that only authorized and safe traffic is allowed to pass through.

Setting up a DMZ with two firewalls allows for load balancing. This means that network traffic can be distributed evenly across multiple servers, preventing any one server from becoming overwhelmed with traffic. Load balancing can improve network performance by ensuring that resources are efficiently utilized and preventing bottlenecks.

Packet Filtering Firewall is one of the types of firewalls. It filters network packets based on predetermined criteria such as source and destination IP addresses, port numbers, and protocol types. It examines each packet and either allows or denies its passage based on the defined rules. This type of firewall is efficient and commonly used as the first line of defense in network security. It helps in protecting the network from unauthorized access and potential threats by controlling the flow of traffic.

A network layer firewall functions as a packet filter. This means that it examines the header and the content of each packet that passes through it and makes decisions based on predetermined rules. It filters packets based on criteria such as source and destination IP addresses, port numbers, and protocol types. By analyzing packets at the network layer, the firewall can determine whether to allow or block specific packets from entering or leaving the network. Therefore, the correct answer is "Packet filter."

A proxy firewall filters at the application layer. This means that it examines the contents of the data packets being transmitted to determine if they meet certain criteria or rules set by the firewall. By filtering at the application layer, the firewall can inspect specific protocols and applications, such as HTTP or FTP, and make decisions based on the content of those protocols. This allows for more granular control and protection against specific types of threats or unauthorized access attempts.