Paloalto Networks Updated Apprentice Exam Questions and Answers by august

Restricting access to phishing websites is an effective URL filtering use case. URL filtering evaluates web destinations by category, reputation, risk, or policy and can block users from visiting malicious or prohibited sites. Phishing sites are designed to steal credentials or sensitive information, so blocking known or suspected phishing URLs reduces the chance that users will submit passwords or tokens to attacker-controlled pages. Monitoring threat logs and traffic logs is a security operations activity, not the direct purpose of URL filtering. Sandboxing potentially malicious files is a malware analysis function. Discovering IoT devices is asset visibility or IoT security, not URL filtering. URL filtering is especially valuable when combined with user awareness, DNS security, browser protection, and identity-based policy. Because phishing often starts with a link, controlling access to risky web destinations is a practical prevention layer. Reference/topics: Network Security 3.3, URL filtering; Cybersecurity 1.3, social engineering and phishing.

DHCP provides IP addressing information to a client. When a device joins a network, it can request configuration from a DHCP server instead of requiring manual assignment. The server leases an IP address to the client and may also provide subnet mask, default gateway, DNS server, lease duration, and other options. DHCP does not provide a MAC address; the MAC address is assigned to the network interface by the hardware vendor. It does not provide a security zone, which is a firewall or segmentation concept. It also does not assign a port range in the normal client addressing process. DHCP is important operationally because it reduces manual configuration and supports scalable network management. It is also useful in investigations because DHCP lease records can help map an IP address observed in logs to the device that used it at a specific time. Reference/topics: Network Fundamentals 2.4, DHCP; Network Fundamentals 2.3, default gateway.

A hub operates at Layer 1, the Physical layer of the OSI model. It repeats electrical or signaling information received on one port out to other ports without understanding frames, MAC addresses, IP addresses, sessions, or applications. Because a hub does not make intelligent forwarding decisions, every connected device receives the same signal, creating a shared collision domain in older Ethernet environments. This differs from a switch, which operates primarily at Layer 2 and forwards frames based on MAC addresses. Routers operate at Layer 3 using IP addressing and routing tables. Layer 4 devices or functions evaluate transport information such as TCP or UDP ports. The purpose of knowing where devices sit in the OSI model is to understand what data each device can inspect and what security decisions it can support. A hub provides connectivity but not meaningful segmentation or filtering. Reference/topics: Network Fundamentals 2.6, OSI model; Network Fundamentals 2.7, devices operating at Layers 1 through 4.

A next-generation firewall is designed to inspect traffic at higher layers, including application-layer information, before deciding whether traffic should be forwarded. It can identify applications, users, content, and threats instead of relying only on ports and IP addresses. This application awareness enables more precise policy decisions, such as allowing sanctioned business applications while blocking evasive or risky applications using the same port. A switch forwards frames using Layer 2 information. A router forwards packets based on Layer 3 addresses and routing decisions. A WAN accelerator improves performance over wide area links and does not primarily make application-layer security enforcement decisions. The application-layer capability is what makes NGFW policy more effective than traditional port-based filtering. In modern networks, many applications use web ports, so inspecting only TCP 80 or 443 is insufficient. Reference/topics: Network Security 3.2, NGFWs; Network Fundamentals 2.6 and 2.7, OSI model and network devices.