(ISC)2
301B · Question #174
301B Question #174: Real Exam Question with Answer & Explanation
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Question
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>
00:25:07.598519 IP 195.56.67.90.https > 168.210.232.5.33159: S
2499001366:2499001366(0) ack 1920647965 win 8192 <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 1460,nop,nop,sackOK>
00:25:07.598851 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
00:31:46.371124 IP 168.210.232.5.53202 > 192.168.100.20.http: S
2389057240:2389057240(0) win 4380 <mss 1460,nop,wscale 0,sackOK,eol>
What is the problem?
Options
- AThe filters on the tcpdumps are incorrect.
- BThe DNS entry for website.com is incorrect.
- CThe virtual server WEBSERVICES1 is listening on the incorrect port.
- DThe firewall is dropping the connection coming from the pool members returned to the client.
- EThe subnet masks of the pool members of pool WebServices1 and the f5 'Internal' Vlan are incorrect.
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