Examice

Exam 301b All QuestionsBrowse all questions from this exam

Question 142

-- Exhibit

-- Exhibit --

Refer to the exhibit.

A company uses a complex piece of client software that connects to one or more virtual servers (VS) hosted on an LTM device. The client software is experiencing issues. An LTM Specialist is tasked with finding the cause of the problem.

The LTM Specialist has the tcpdump extract and knows the client software has at least one connection to a VS on port 1990. However, when a tcpdump runs on the internal VLAN, there is no record of port 1990 in the tcpdump.

Why is there no record of port 1990 in the tcpdump?

The LTM device drops the connection.

Port 1990 is a well-known port, so its use is restricted.

The LTM device performs a Port Address Translation (PAT).

The LTM device performs a Network Address Translation (NAT).

Correct Answer: C

Port Address Translation (PAT) allows multiple devices on a local network to be mapped to a single public IP address but with a different port number for each session. The absence of port 1990 in the tcpdump on the internal VLAN is likely due to the LTM device performing PAT, translating the original port number (1990) to a different internal port number.

Discussion

GVKDOption: C

C - Correct