Question 16

Given:
Filesystem Size Used Avail Use% Mounted on
/dev/md11 248M 248M 0 100% /
/dev/md13 3.0G 76M 2.8G 3% /config
/dev/md12 1.7G 1.1G 476M 71% /usr
/dev/md14 3.0G 214M 2.6G 8% /var
/dev/md0 30G 2.2G 26G 8% /shared
/dev/md1 6.9G 288M 6.3G 5% /var/log
none 3.9G 452K 3.9G 1% /dev/shm
none 3.9G 19M 3.9G 1% /var/tmstat
none 3.9G 1.2M 3.9G 1% /var/run
prompt 4.0M 12K 4.0M 1% /var/prompt
/dev/md15 12G 8.3G 3.1G 74% /var/lib/mysql
Which command is used to produce this output?
  • Question 17

    -- 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?
  • Question 18

    The LTM device is configured to provide load balancing to a set of web servers that implement access control lists (ACL) based on the source IP address of the client. The ACL is at the network level and the web server is configured to send a TCP reset back to the client if it is NOT permitted to connect.
    The virtual server is configured with the default OneConnect profile.
    The ACL is defined on the web server as:
    Permit: 192.168.136.0/24 Deny: 192.168.116.0/24
    The packet capture is taken of two individual client flows to a virtual server with IP address
    192.168.136.100.
    Client A - Src IP 192.168.136.1 - Virtual Server 192.168.136.100:
    Clientside:
    09:35:11.073623 IP 192.168.136.1.55684 > 192.168.136.100.80: S 869998901:869998901(0) win
    8192 <mss 1460,nop,wscale 2,nop,nop,sackOK>
    09:35:11.073931 IP 192.168.136.100.80 > 192.168.136.1.55684: S 2273668949:2273668949(0)
    ack 869998902 win 4380 <mss 1460,nop,wscale 0,sackOK,eol>
    09:35:11.074928 IP 192.168.136.1.55684 > 192.168.136.100.80: . ack 1 win 16425 09:35:11.080936 IP 192.168.136.1.55684 > 192.168.136.100.80: P 1:299(298) ack 1 win 16425 09:35:11.081029 IP 192.168.136.100.80 > 192.168.136.1.55684: . ack 299 win 4678
    Serverside:
    09:35:11.081022 IP 192.168.136.1.55684 > 192.168.116.128.80: S 685865802:685865802(0) win
    4380 <mss 1460,nop,wscale 0,sackOK,eol>
    09:35:11.081928 IP 192.168.116.128.80 > 192.168.136.1.55684: S 4193259095:4193259095(0)
    ack 685865803 win 5840 <mss 1460,nop,nop,sackOK,nop,wscale 6>
    09:35:11.081943 IP 192.168.136.1.55684 > 192.168.116.128.80: . ack 1 win 4380 09:35:11.081955 IP 192.168.136.1.55684 > 192.168.116.128.80: P 1:299(298) ack 1 win 4380 09:35:11.083765 IP 192.168.116.128.80 > 192.168.136.1.55684: . ack 299 win 108
    Client B - Src IP 192.168.116.1 - Virtual Server 192.168.136.100:
    Clientside:
    09:36:11.244040 IP 192.168.116.1.55769 > 192.168.136.100.80: S 3320618938:3320618938(0)
    win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK>
    09:36:11.244152 IP 192.168.136.100.80 > 192.168.116.1.55769: S 3878120666:3878120666(0)
    ack 3320618939 win 4380 <mss 1460,nop,wscale 0,sackOK,eol>
    09:36:11.244839 IP 192.168.116.1.55769 > 192.168.136.100.80: . ack 1 win 16425 09:36:11.245830 IP 192.168.116.1.55769 > 192.168.136.100.80: P 1:299(298) ack 1 win 16425 09:36:11.245922 IP 192.168.136.100.80 > 192.168.116.1.55769: . ack 299 win 4678
    Serverside:
    09:36:11.245940 IP 192.168.136.1.55684 > 192.168.116.128.80: P 599:897(298) ack 4525 win 09:36:11.247847 IP 192.168.116.128.80 > 192.168.136.1.55684: P 4525:5001(476) ack 897 win
    Why was the second client flow permitted by the web server?
  • Question 19

    An LTM Specialist uploaded new releases .iso and .md5 files titled "BIGIP-FILENAME" via the GUI.
    Which commands are run via the command line from the root directory to verify the integrity of the new .iso file?
  • Question 20

    Windows PC clients are connecting to a virtual server over a high-speed, low-latency network with no packet loss.
    Which built-in client-side TCP profile provides the highest throughput for HTTP downloads?