301b Exam Question 1

-- Exhibit -

-- Exhibit --
Refer to the exhibit.
A virtual server is set up on an LTM device as follows:
Virtual server address 78.24.213.79
Default Persistence ProfilE. source_addr, 600s.
Pool NamE. Pool1
Pool Members: 10.72.250.52:80 and 10.72.250.60:80 (both on Internal Vlan) There are several current connections to the virtual server, and pool member 10.72.250.52:80 has been set to a "Disabled" state.
A tcpdump on the Internal Vlan shows traffic going to 10.72.250.52:80.
How soon after the persistence table query was run can existing connections be refreshed/renewed to ensure that no requests are sent to 10.72.250.52?
  • 301b Exam Question 2

    -- Exhibit-

    -- Exhibit -Refer to the exhibit. An LTM Specialist is working on an LTM 11.0.0 installation and has identified a security
    vulnerability as shown in the exhibit. The LTM Specialist is tasked with applying the latest
    available hotfix to resolve the problem.
    Which procedure resolves the problem?
  • 301b Exam Question 3

    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 8904
    09:36:11.247847 IP 192.168.116.128.80 > 192.168.136.1.55684: P 4525:5001(476) ack 897 win 142 Why was the second client flow permitted by the web server?
  • 301b Exam Question 4

    An LTM device pair is configured for failover and connection mirroring. The LTM devices are configured with virtual servers for HTTP, HTTPS with SSL offload, and SSH. An event occurs that causes a failover. HTTP and SSH sessions active at the time of failover remain active, but HTTPS sessions are dropped.
    What is the root cause of this problem?
  • 301b Exam Question 5

    -- 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?