DHCP.MIB: Monitors network traffic between DHCP servers and remote hosts
# HOSTMIB.MIB: Monitors and manages host resources
# LNMIB2.MIB: Contains object types for workstation and server services
# MIBJI.MIB: Manages TCP/IP-based Internet using a simple architecture and system
# WINS.MIB: For the Windows Internet Name Service (WINS)

CEH v13 defines a white hat hacker as a security professional who performs authorized assessments to identify vulnerabilities and strengthen an organization's defenses. The defining characteristic of white hat activity is the presence of formal permission-typically through a signed rules-of-engagement, scope of work, and explicit authorization from the organization. CEH emphasizes that white hats adhere to legal boundaries, follow ethical guidelines, and document findings to support remediation. They may use the same tools and methodologies as malicious hackers, but the intent and authorization distinguish them. In contrast, black hats operate without permission and with malicious intent. Grey hats act without authorization but may not have malicious motivations, making them inappropriate in a formal penetration testing engagement. Script kiddies lack professional skill and rely on pre-made tools without understanding the underlying techniques.
Therefore, the hacker described is a white hat-an ethical professional performing sanctioned testing.

Firewalk, covered in CEH v13 Module 03, is a firewall analysis tool that uses TTL-limited probes to determine which ports are allowed through a filtering device (firewall/router).
If a Time-to-Live Exceeded message is received, it means the packet made it past the firewall and was stopped before reaching the target host.
No response typically means filtered or blocked.
Therefore:
Ports 21 and 22 are filtered by the firewall.
Port 23 triggered a TTL Exceeded, meaning it passed through the firewall, and likely hit a router or was dropped due to TTL=0 before reaching the host.
Reference:
Module 03 - Scanning Networks - Using Firewalk
CEH iLabs - Firewall Analysis with Firewalk

Developed by Robert "RSnake" Hansen, Slowloris is DDoS attack software that permits one computer to require down an internet server. Due the straightforward yet elegant nature of this attack, it requires minimal bandwidth to implement and affects the target server's web server only, with almost no side effects on other services and ports.
Slowloris has proven highly-effective against many popular sorts of web server software, including Apache 1.
x and 2.x.
Over the years, Slowloris has been credited with variety of high-profile server takedowns. Notably, it had been used extensively by Iranian 'hackivists' following the 2009 Iranian presidential election to attack Iranian government internet sites .
Slowloris works by opening multiple connections to the targeted web server and keeping them open as long as possible. It does this by continuously sending partial HTTP requests, none of which are ever completed. The attacked servers open more and connections open, expecting each of the attack requests to be completed.
Periodically, the Slowloris sends subsequent HTTP headers for every request, but never actually completes the request. Ultimately, the targeted server's maximum concurrent connection pool is filled, and extra (legitimate) connection attempts are denied.
By sending partial, as against malformed, packets, Slowloris can easily elapse traditional Intrusion Detection systems.
Named after a kind of slow-moving Asian primate, Slowloris really does win the race by moving slowly and steadily. A Slowloris attack must await sockets to be released by legitimate requests before consuming them one by one.
For a high-volume internet site , this will take a while . the method are often further slowed if legitimate sessions are reinitiated. But within the end, if the attack is unmitigated, Slowloris-like the tortoise-wins the race.
If undetected or unmitigated, Slowloris attacks also can last for long periods of your time . When attacked sockets outing , Slowloris simply reinitiates the connections, continuing to reach the online server until mitigated.
Designed for stealth also as efficacy, Slowloris are often modified to send different host headers within the event that a virtual host is targeted, and logs are stored separately for every virtual host.
More importantly, within the course of an attack, Slowloris are often set to suppress log file creation. this suggests the attack can catch unmonitored servers off-guard, with none red flags appearing in log file entries.
Methods of mitigation
Imperva's security services are enabled by reverse proxy technology, used for inspection of all incoming requests on their thanks to the clients' servers.
Imperva's secured proxy won't forward any partial connection requests-rendering all Slowloris DDoS attack attempts completely and utterly useless.

bettercap is a tool that can perform session hijacking attacks on wireless networks, among other network security and penetration testing tasks. bettercap can capture and manipulate network traffic, perform man-in- the-middle attacks, spoof and sniff protocols, inject custom payloads, and more1.
bettercap can perform session hijacking attacks on wireless networks that use the WPA-PSK security protocol by exploiting the four-way handshake process that occurs when a client connects to a wireless access point.
The four-way handshake is used to establish a shared encryption key between the client and the access point, based on the pre-shared key (PSK) that is configured on both devices. However, the four-way handshake also exposes some information that can be used to crack the PSK offline, such as the nonce values, the MAC addresses, and the message integrity code (MIC) of the packets2.
bettercap can capture the four-way handshake packets using its Wi-Fi module and save them in a file. The file can then be fed to a tool like Hashcat or Aircrack-ng to crack the PSK using brute force or dictionary attacks. Once the PSK is obtained, bettercap can use it to decrypt the wireless traffic and perform session hijacking attacks on the clients connected to the access point3.
Therefore, bettercap is an appropriate tool to carry out a session hijacking attack on a wireless network that uses the WPA-PSK security protocol.
References:
bettercap: the Swiss Army knife for 802.11, BLE and Ethernet networks reconnaissance and MITM attacks How the WPA2 Enterprise Wireless Security Protocol Works Cracking WPA/WPA2 Passwords with Bettercap and Hashcat