Exam 301b Topic 1 Question 120 Discussion
Actual exam question for F5's 301b exam
Question #: 120
Topic #: 1
Question #: 120
Topic #: 1
-- Exhibit -

-- Exhibit -Refer to the exhibit. Users receive an error when attempting to connect to the website https://website.com. The
website has a DNS record of 195.56.67.90. The upstream ISP has confirmed that there is nothing
wrong with the routing between the user and the LTM device.
The following tcpdump outputs have been captured:
External Vlan, filtered on IP 168.210.232.5
00:25:07.598519 IP 168.210.232.5.33159 > 195.56.67.90.https: S 1920647964:1920647964(0) win 8192 <mss 1450,nop,nop,sackOK>
00:25:07.598537 IP 195.56.67.90.https > 168.210.232.5.33159: S 2690691360:2690691360(0) ack 1920647965 win 4350 <mss 1460,sackOK,eol>
00:25:07.598851 IP 168.210.232.5.33160 > 195.56.67.90.https: S 2763858764:2763858764(0) win 8192 <mss 1450,nop,nop,sackOK>
00:25:07.598858 IP 195.56.67.90.https > 168.210.232.5.33160: S 1905576176:1905576176(0) ack 2763858765 win 4350 <mss 1460,sackOK,eol>
Internal Vlan, filtered on IP 168.210.232.5
00:31:46.171124 IP 168.210.232.5.33202 > 192.168.100.20.http: S 2389057240:2389057240(0) win 4380 <mss 1460,nop,wscale 0,sackOK,eol>
What is the problem?

-- Exhibit -Refer to the exhibit. Users receive an error when attempting to connect to the website https://website.com. The
website has a DNS record of 195.56.67.90. The upstream ISP has confirmed that there is nothing
wrong with the routing between the user and the LTM device.
The following tcpdump outputs have been captured:
External Vlan, filtered on IP 168.210.232.5
00:25:07.598519 IP 168.210.232.5.33159 > 195.56.67.90.https: S 1920647964:1920647964(0) win 8192 <mss 1450,nop,nop,sackOK>
00:25:07.598537 IP 195.56.67.90.https > 168.210.232.5.33159: S 2690691360:2690691360(0) ack 1920647965 win 4350 <mss 1460,sackOK,eol>
00:25:07.598851 IP 168.210.232.5.33160 > 195.56.67.90.https: S 2763858764:2763858764(0) win 8192 <mss 1450,nop,nop,sackOK>
00:25:07.598858 IP 195.56.67.90.https > 168.210.232.5.33160: S 1905576176:1905576176(0) ack 2763858765 win 4350 <mss 1460,sackOK,eol>
Internal Vlan, filtered on IP 168.210.232.5
00:31:46.171124 IP 168.210.232.5.33202 > 192.168.100.20.http: S 2389057240:2389057240(0) win 4380 <mss 1460,nop,wscale 0,sackOK,eol>
What is the problem?
Suggested Answer: B Vote an answer
by Alberta at Sep 18, 2026, 12:40 AM
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