CNS-225: Deploy and Manage Citrix ADC 13.x with Traffic Management Quiz Questions and Answers
Answer :
2; new
Explanation :
Weight is the priority defined when adding servers in load-balancing. Generally the Back-end servers are of same capacity and we do not require the change the default weight value, but in this case the new servers are of higher capacity as compared to existing servers, so administrator should add 2 as a weight for new servers so they receive double request at same time as compared to existing old back-end servers (of less capacity), so 2 is the priority assigned for new srevers to recieve more requests
This is a concept of Slow Start in ADC. As per design, when ADC restarts or any Vserver restarts, then for sometime ADC uses by default Round Robin load balancing method contradicting to the defined load balancing method, to prevent backend servers from getting overwhelmed by the defined least connection request, and once the Vserver status is up and stable the ADC switches to administrator defined load balancing method.
MAC-based forwarding improves performance of ADC by avoiding multiple ARP or route table lookup when forwarding the packet, When MBF is enabled it cache the MAC address of uplink router which forwarded the requestto ADCand when reply is received it is passed t osame router who sent client requestwithout going through any route lookup.
Tagging an Interface and VLAN helps to identify from which VLAN traffic is being received by an interface. For ex : If we have 2 VLANs and one Interface on ADC is a part of both VLAN, then tagging interface with VLAN ID helpto identify the incoming traffic, from which VLAN traffic is received at an interface.
To utilize client IP address as source IP Address in ADC for backend server connections, administrator should choose USIP(Use Source IP) mode. USIP needs to enabled from system configuration tab in GUI. Remember enabling USIP mode disables the multiplexing and surge protection capability of Netscaler.
When enabling management access to SNIP, and accessing ADC through SNIP, then by default, it will show only Primary ADC on top in the list of ADCs in HA, so it's easily identified to get connected to Primary ADC, without even knowing which ADC is actually Primary at the time of access.
Configure admin partitions that use dedicated VLANs
Explanation :
Admin partitions option in ADC allows to divide single ADC into multiple logical isolated ADCs, with their separate networking, user accounts and management, however Hardware Isolation is not achieved by Admin Partiotions. We can create upto 512 admin partitions of single ADC.
The ns.log has reached its 100 KB limit. Press ‘CTRL+C’ to stop it from running and issue the command “tail-f ns.log” to resume.
Explanation :
The ns.log is a part of SYSLOG and has a limit of 100KB per file and once the limit has reached, a new ns.log file is created. For Ex : ns.log , then ns.log1, then ns.log2……upto ns.log26. Maximum of 26 files ofns.log are created for SYSLOG in /var/log/ directory.
Configure HA Fail-safe mode on each NetScaler independently.
Explanation :
Configuring fail-safe mode on each netscaler independently forces Primary ADC to stay primary in the event of failure at a condition when secondary node is not ready to become Primary due to some issues (interface down) at secondary as well at same time.
The first part of an expression before && represents client's source IP and second part of expression i.e after && represents that client request will be blocked , and is enclosed by brackets to join client's UDP and client's TCP request to DNS @ port 53
