JN0-335 CERTIFICATION & JN0-335 VALID TEST COST

JN0-335 Certification & JN0-335 Valid Test Cost

JN0-335 Certification & JN0-335 Valid Test Cost

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Tags: JN0-335 Certification, JN0-335 Valid Test Cost, Exam JN0-335 Success, JN0-335 Practice Exam Online, Online JN0-335 Lab Simulation

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Juniper Security, Specialist (JNCIS-SEC) Sample Questions (Q166-Q171):

NEW QUESTION # 166
You have implemented a vSRX in your VMware environment. You want to implement a second vSRX Series device and enable chassis clustering.
Which two statements are correct in this scenario about the control-link settings? (Choose two.)

  • A. In the vSwitch security settings, accept promiscuous mode.
  • B. In the vSwitch security settings, reject MAC address changes.
  • C. In the vSwitch properties settings, set the VLAN ID to None.
  • D. In the vSwitch security settings, reject forged transmits.

Answer: B,D


NEW QUESTION # 167
Which sequence does an SRX Series device use when implementing stateful session security policies using Layer 3 routes?

  • A. An SRX Series device performs a security policy search before implementing an ALG security check on the longest-match Layer 3 route.
  • B. An SRX Series device will conduct a longest-match Layer 3 route table lookup before performing a security policy search.
  • C. An SRX Series device conducts an ALG security check on the longest-match route before performing a security policy search.
  • D. An SRX Series device will perform a security policy search before conducting a longest-match Layer 3 route table lookup.

Answer: B

Explanation:
Explanation
A stateful firewall in SRX Series devices keeps track of the state of network connections, distinguishing legitimate packets for different types of connections and allowing only packets that match a known active connection. Sessions are created when a TCP SYN packet is received and permitted by the security policy1.
A security policy is a set of rules that defines how traffic is processed by the SRX Series device. A security policy applies the security rules to the transit traffic within a context (from-zone to to-zone) and each policy is uniquely identified by its name. The traffic is classified by matching the source and destination zones, the source and destination addresses, and the application that the traffic carries in its protocol headers with the policy database in the data plane2.
A Layer 3 route is a path that a packet takes to reach its destination based on the destination IP address. The SRX Series device performs a longest-match Layer 3 route table lookup to determine the next hop for the packet3.
An Application Layer Gateway (ALG) is a software component that provides application-level awareness, security, and control for specific protocols. An ALG inspects the application-layer payload of a packet and modifies it if necessary to allow the application to traverse the SRX Series device. For example, an ALG can rewrite IP addresses and port numbers in the payload of FTP or SIP packets4.
The sequence that an SRX Series device uses when implementing stateful session security policies using Layer 3 routes is as follows3:
The SRX Series device receives a packet and conducts a longest-match Layer 3 route table lookup to determine the next hop for the packet.
The SRX Series device performs a security policy search to find a matching policy for the packet based on the source and destination zones, addresses, and application.
If a matching policy is found, the SRX Series device checks the action of the policy, which can be permit, deny, reject, or tunnel. If the action is permit, the SRX Series device allows the packet to pass through and creates a session for the packet. If the action is deny or reject, the SRX Series device drops the packet and sends an ICMP message to the sender. If the action is tunnel, the SRX Series device encapsulates the packet and forwards it to the tunnel destination.
If the packet requires an ALG, the SRX Series device applies the ALG to the packet and modifies the payload if necessary. The ALG also creates additional sessions for the packet if needed.
The SRX Series device forwards the packet to the next hop based on the routing information.
References:
1: Traffic Processing on SRX Series Firewalls Overview | Junos OS | Juniper Networks
2: Best Practices for Defining Policies on High-End SRX Series Devices - TechLibrary - Juniper Networks
3: [SRX] Example: Configuring TCP SYN Check options on a per-policy basis
4: Application Layer Gateways Overview | Junos OS | Juniper Networks


NEW QUESTION # 168
You want to show tabular data for operational mode commands.
In this scenario, which logging parameter will provide this function?

  • A. permit
  • B. session-close
  • C. count
  • D. session-init

Answer: C

Explanation:
Explanation
The count logging parameter displays the number of packets that match the firewall filter term in a tabular format. The count parameter also creates a counter that you can view with the show firewall command. The other logging parameters (permit, session-init, and session-close) do not show tabular data, but rather log the packets that match the term to a system log file or a user-specified file. References:
Understanding Firewall Filter Counters
Configuring Firewall Filter Counters
show firewall


NEW QUESTION # 169
A routing change occurs on an SRX Series device that involves choosing a new egress interface.
In this scenario, which statement is true for all affected current sessions?

  • A. The current sessions are torn down and go through first path processing based on the new route.
  • B. The current sessions might change based on the corresponding security policy.
  • C. The current session are torn dowm only if the policy-rematch option has been enabled.
  • D. The current sessions do not change.

Answer: A


NEW QUESTION # 170
Which two statements are correct about a reth LAG? (Choose two.)

  • A. Links must have the same speed and duplex setting.
  • B. Links must use the same cable type
  • C. You should have two or more interfaces.
  • D. You must have a "minimum-links" statement value of two.

Answer: A,C

Explanation:
A reth LAG is a redundant Ethernet link aggregation group that combines multiple physical interfaces into a single logical interface in a chassis cluster. A reth LAG provides load balancing and redundancy for traffic within or between redundancy groups. Two statements that are correct about a reth LAG are:
Links must have the same speed and duplex setting: To form a reth LAG, the physical interfaces must have the same speed and duplex setting. This ensures that the links can operate at the same capacity and avoid performance issues or errors.
You should have two or more interfaces: To create a reth LAG, you need to have at least two physical interfaces. One interface should be connected to node 0 and the other interface should be connected to node 1. You can also have more than two interfaces in a reth LAG for increased bandwidth and redundancy.


NEW QUESTION # 171
......

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