View Full Citrix 1Y0-342 Exam Dumps and Practice Test Dumps.

Question 201. What does TCP window scaling increase?

1. DNS cache size
2. SSL session count
3. TCP receive window
4. Policy priority

Correct Answer: 3. TCP receive window

Explanation:

TCP window scaling allows the TCP receive window to grow beyond the normal maximum of 65535 bytes. This can improve throughput on networks with high bandwidth and noticeable latency because more data can remain in transit before an acknowledgment is required. Both sides of the TCP connection must negotiate the window scaling option during connection establishment for it to be used. NetScaler can configure window scaling through TCP profiles. Administrators should avoid unnecessarily large scaling values because inappropriate settings can negatively affect performance and resource usage rather than improve application delivery.

Question 202. What does TCP SACK improve?

1. Recovery from packet loss
2. DNS resolution
3. SSL certificate renewal
4. GSLB persistence

Correct Answer: 1. Recovery from packet loss

Explanation:

Selective Acknowledgment allows a TCP receiver to tell the sender which data segments arrived successfully. When several packets are lost, the sender can retransmit only the missing segments instead of unnecessarily retransmitting data already received. This can significantly improve throughput and reduce recovery time on networks affected by packet loss. NetScaler allows SACK to be enabled through a TCP profile and then applies that profile to supported virtual servers. SACK is particularly useful on high bandwidth networks where inefficient retransmission behavior could otherwise reduce application performance and increase connection latency.

Question 203. What does TCP MSS define?

1. Maximum SSL sessions
2. Maximum DNS records
3. Maximum server count
4. Maximum TCP segment data size

Correct Answer: 4. Maximum TCP segment data size

Explanation:

Maximum Segment Size defines the largest amount of TCP data that can be carried in one TCP segment. The appropriate MSS depends on the network MTU and the headers that must also fit inside each packet. NetScaler allows administrators to configure MSS values through TCP profiles. Incorrect MSS values can lead to inefficient fragmentation behavior or communication problems when intermediate network devices cannot carry packets of the expected size. Administrators should therefore understand the complete network path before modifying MSS and should normally preserve suitable defaults unless a specific application or network requirement justifies a change.

Question 204. What does TCP keep alive check?

1. GSLB site priority
2. Peer connection availability
3. Certificate chain order
4. Cache object age

Correct Answer: 2. Peer connection availability

Explanation:

TCP keep alive checks whether the peer on an established TCP connection remains operational. NetScaler can send keep alive probes at configured intervals so that broken or unreachable peer connections can be detected rather than remaining open indefinitely. TCP profiles provide the settings used to control this behavior and can be bound to one or multiple virtual servers. Keep alive is particularly helpful for long lived connections that may otherwise remain idle for extended periods. It is a transport optimization feature and should not be confused with HTTP Client Keep Alive, which focuses on reusing HTTP client connections for multiple requests.

Question 205. What does dynamic RTT GSLB select?

1. Site with the lowest network delay
2. Site with most servers
3. Site with longest response time
4. Site with highest IP address

Correct Answer: 1. Site with the lowest network delay

Explanation:

Dynamic round trip time GSLB measures network delay between the client local DNS infrastructure and available data resources. NetScaler probes the client local DNS server and gathers round trip time metrics. It then uses those measurements to direct the request toward the data center with the lowest measured delay. This can improve application response time because the selected site is dynamically chosen according to current network conditions rather than a fixed geographic mapping. Dynamic RTT is especially useful for applications where fast access to large amounts of data is important and network delay can vary over time.

Question 206. What does Static Proximity GSLB use?

1. Active connection count
2. SSL cipher strength
3. Cache hit ratio
4. Client network location information

Correct Answer: 4. Client network location information

Explanation:

Static Proximity uses configured proximity information to direct clients toward a geographically or logically nearby data center. Unlike Dynamic RTT, it does not continuously measure live network delay for every decision. Instead, NetScaler uses proximity data associated with client networks and GSLB sites. This can be useful for internal branch networks or other environments where administrators already know which data center should normally serve particular client address ranges. Static Proximity can also be combined with Dynamic RTT so known internal networks use fixed proximity while other clients are directed according to measured network delay.

Question 207. What happens to some GSLB methods when MEP is unavailable and no remote monitor exists?

1. GSLB stops completely
2. They fall back to Round Robin
3. DNS is disabled
4. Persistence becomes permanent

Correct Answer: 2. They fall back to Round Robin

Explanation:

Some GSLB methods depend on information about remote site status or performance. If Metric Exchange Protocol is disabled and no explicit monitor is bound to the remote GSLB service, NetScaler does not have the required remote metric information. Methods such as RTT, Least Connections, Least Bandwidth, Least Packets, and Least Response Time then fall back to Round Robin behavior. Administrators should therefore configure MEP or appropriate explicit monitoring when they expect metric based methods to make informed decisions about remote sites. Without that information, the selected advanced method cannot operate as intended.

Question 208. What does GSLB Least Connections select?

1. Service with highest bandwidth
2. Service with lowest latency only
3. Service with fewest active connections
4. Service with newest configuration

Correct Answer: 3. Service with fewest active connections

Explanation:

The GSLB Least Connections method selects the available GSLB service with the fewest active connections. This can help distribute application traffic toward sites or services that currently have less connection load. For remote services, NetScaler must have suitable status and metric information through MEP or explicit monitoring. If the required information is unavailable, the method can fall back to Round Robin. Least Connections differs from Dynamic RTT, which focuses on network delay, and Least Response Time, which considers active connection count together with average response time.

Question 209. What does GSLB Least Response Time consider?

1. DNS cache size only
2. Server priority only
3. Number of certificates
4. Active connections and average response time

Correct Answer: 4. Active connections and average response time

Explanation:

Least Response Time selects the GSLB service with the lowest calculated value based on current active connections multiplied by average response time. Response time is measured as the interval between sending a request packet and receiving the first response packet. NetScaler uses a successful HTTP response to calculate this information for applicable services. The method is supported for HTTP and SSL services. By considering both connection load and responsiveness, it attempts to choose a service that is not only available but also likely to provide good application performance to the client.

Question 210. Which Content Switching policy type is evaluated first by default?

1. Rule based policy
2. Wildcard URL policy
3. Exact URL policy
4. Domain policy

Correct Answer: 1. Rule based policy

Explanation:

By default, NetScaler evaluates rule based Content Switching policies before URL based policies. Administrators can change policy precedence when the application design requires URL based matching to occur first. Priority is also important when several policies of the same evaluation category are bound to one Content Switching virtual server. Rule based policies use expressions to evaluate request information such as headers, addresses, methods, or other supported attributes. Correct precedence planning is essential because the selected policy determines which target load balancing virtual server receives the client request.

Question 211. What does a Wildcard URL Content Switching policy match?

1. Only complete URLs
2. Only DNS server addresses
3. Partial URL patterns
4. Only client certificates

Correct Answer: 3. Partial URL patterns

Explanation:

A Wildcard URL Content Switching policy allows NetScaler to match partial URL patterns. Administrators can use a wildcard with a URL prefix, suffix, or a combination of both. For example, a configuration can match every request under a particular directory or every file ending with a particular extension. This provides flexible application routing without requiring one policy for every complete URL. A Domain and Wildcard URL policy can also combine complete domain matching with partial URL matching. The selected Content Switching policy directs the request to its configured target load balancing virtual server.

Question 212. What does a Domain and Exact URL policy require?

1. Only a partial host match
2. Complete domain and exact configured URL match
3. Only a client IP match
4. Any URL with the same suffix

Correct Answer: 2. Complete domain and exact configured URL match

Explanation:

A Domain and Exact URL Content Switching policy requires the client request to match the configured complete domain name and the configured URL criteria exactly. If a prefix and suffix are configured, the incoming request must satisfy those exact values rather than merely sharing part of the URL. This policy type is appropriate when administrators need precise routing for a particular application location. A Domain and Wildcard URL policy is more suitable when the request needs only a partial prefix or suffix match. Selecting the correct policy type prevents traffic from being routed too broadly or too narrowly.

Question 213. What takes precedence when a Content Switching virtual server has both a backup and redirect URL?

1. Backup virtual server
2. Redirect URL
3. Client preference
4. Cache server

Correct Answer: 1. Backup virtual server

Explanation:

When a Content Switching virtual server has both a backup Content Switching virtual server and a redirect URL configured, the backup virtual server takes precedence. NetScaler attempts to use an available backup Content Switching virtual server to continue delivering application traffic. The redirect URL is used only when both the primary and the available backup path are down. This ordering provides better application continuity because users continue receiving service through another virtual server before being redirected elsewhere. Administrators can also configure cascaded backups when more than one fallback level is required for a critical application.

Question 214. What is the maximum depth of cascaded backup Content Switching virtual servers?

1. 2
2. 5
3. 8
4. 10

Correct Answer: 4. 10

Explanation:

NetScaler supports a maximum cascaded backup depth of ten Content Switching virtual servers. A primary Content Switching virtual server can reference a backup, and that backup can reference another backup, creating several levels of fallback protection. When a virtual server becomes unavailable, NetScaler searches the configured backup chain for an available Content Switching virtual server that can deliver the content. This design can provide substantial application resilience, although very complex chains should still be documented carefully. If no suitable primary or backup virtual server remains available, an optional redirect URL can provide another fallback response.

Question 215. Which redirect URL type does Citrix recommend for Content Switching failure handling?

1. Relative URL only
2. Absolute URL
3. Empty URL
4. DNS alias only

Correct Answer: 2. Absolute URL

Explanation:

Citrix recommends using an absolute redirect URL when configuring a Content Switching virtual server failure redirect. An absolute URL explicitly identifies the complete destination and reduces ambiguity in how the client request should be redirected. A relative redirect can append the incoming request URL to the configured domain and can sometimes cause vulnerability scanning tools to report false positives. Redirect URLs are used when the Content Switching virtual server is down or disabled and no preferred backup virtual server can handle the traffic. The redirect therefore acts as a final user facing fallback mechanism.

Question 216. How can one HTTP Content Switching virtual server listen on multiple ports?

1. Bind several certificates
2. Enable GSLB
3. Use a wildcard port
4. Disable Content Switching

Correct Answer: 3. Use a wildcard port

Explanation:

NetScaler allows an HTTP or SSL Content Switching virtual server to listen on multiple ports by configuring the port as a wildcard. This removes the need to create several separate virtual servers with the same IP address when the application must accept traffic on multiple ports. The feature is particularly useful when Content Switching decisions are based on URL information or other application layer attributes rather than the destination port. Reducing the number of separate virtual server objects can simplify configuration and administration while preserving the desired content based traffic routing logic.

Question 217. What can a listen policy restrict on a wildcard Content Switching virtual server?

1. SSL key size only
2. DNS TTL only
3. Backend monitor interval
4. Traffic from a specific VLAN

Correct Answer: 4. Traffic from a specific VLAN

Explanation:

A listen policy can restrict a wildcard Content Switching virtual server so that it processes traffic only from a specified VLAN or other supported condition. This is useful when the virtual server uses wildcard addressing or ports but should not accept every packet reaching that broad listener. For example, an administrator can create a policy that evaluates the VLAN identifier and allows the virtual server to listen only to packets arriving through one specific VLAN. A listen priority can also control evaluation when several listen policies exist. This provides precise control over broad wildcard virtual server configurations.

Question 218. Which probe protocols can an external Content Switching health check use?

1. ICMP and ARP
2. HTTP and TCP
3. FTP and SMTP
4. DNS and SNMP

Correct Answer: 2. HTTP and TCP

Explanation:

External health checking for supported UDP and non HTTP TCP Content Switching virtual servers can use HTTP or TCP probes. Administrators configure the probe protocol and the destination probe port. When HTTP is selected, a successful response string can also be configured, with a documented default success response. This allows a Content Switching virtual server to determine availability through an external application endpoint even though the production service type itself may not be HTTP. The feature provides more useful health validation than relying only on the state of the original protocol listener in certain application designs.

Question 219. Which policy bank is evaluated first for Content Switching traffic?

1. Global override
2. Content Switching virtual server
3. Global default
4. Load balancing virtual server

Correct Answer: 1. Global override

Explanation:

For traffic processed through a Content Switching virtual server, NetScaler evaluates advanced policies beginning with the global override policy bank. Policies bound to the selected load balancing virtual server are evaluated next, followed by policies bound to the Content Switching virtual server, and finally global default policies. Goto expressions can stop or change the policy evaluation flow. Understanding this order is important when the same feature has policies bound at several levels because a policy evaluated earlier can determine the action before a later policy is reached. Correct policy placement therefore affects the final traffic behavior.

Question 220. Which policy bank is evaluated last for Content Switching traffic?

1. Load balancing virtual server
2. Content Switching virtual server
3. Global default
4. Global override

Correct Answer: 3. Global default

Explanation:

Global default is evaluated last in the documented advanced policy evaluation sequence for Content Switching traffic. The order begins with global override, then policies associated with the load balancing virtual server, then policies on the Content Switching virtual server, and finally global default. The exact path can still be affected by Goto expressions such as END. Global default policies are therefore useful for broad fallback behavior that should apply only when earlier and more specific policy banks have not already completed processing. Understanding this evaluation hierarchy helps administrators avoid unexpected policy interactions across different bind points.