What is the primary role of Class of Service (CoS) in an IPsec VPN?

To prioritize and manage traffic within the IPsec tunnel

To encrypt and authenticate IPsec traffic

To establish and maintain the IPsec security associations

To compress IPsec packets to reduce bandwidth usage

In MPLS-based IPsec VPNs, which field is used to carry CoS information?

The MPLS EXP (Experimental) bits

In an IPsec VPN, how does CoS typically handle DSCP values in the inner and outer IP headers?

The inner header's DSCP is used for prioritization in the network

Both inner and outer DSCP values are used equally

DSCP values are not used in IPsec

The outer header's DSCP is used for prioritization in the network

An enterprise uses an IPsec VPN to connect its headquarters to a remote site. The VPN carries mission-critical database traffic and less critical web browsing. The network team wants to ensure that database traffic is never dropped during congestion, while web browsing can be dropped if necessary. They have configured a firewall filter to classify database traffic into the 'expedited-forwarding' forwarding class and web browsing into 'best-effort'. What additional configuration is required on the tunnel interface to enforce this behavior?

Apply a scheduler map that assigns a strict-priority queue to the expedited-forwarding class and a weighted round-robin queue to the best-effort class.

Configure a policer on the tunnel interface that limits web browsing traffic to a lower rate.

Set the tunnel interface's 'preference' to a higher value to prioritize its routing.

Enable 'tunnel-gre' encapsulation to reduce overhead and improve performance.

When configuring CoS marking for IPsec traffic, what does the 'marking' action do?

It encrypts the packet with a new key

It sets the DSCP or EXP bits in the packet header to a specific value

It drops packets that do not meet the CoS criteria

It changes the routing path of the packet

Juniper NetworksCertified Professional, Security (JNCIP-SEC)

Domain 5Objective 7

IPsec Class of Service (CoS) JN0-637 Practice Questions (Page 4)

Part of the Advanced IPsec VPNs domain, which makes up ~20% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–12 in this domain), expect 1–2 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

7concepts

Questions 16–20

16foundation · easy
What is the primary role of Class of Service (CoS) in an IPsec VPN?
Select an answer first
17foundation · easy
In MPLS-based IPsec VPNs, which field is used to carry CoS information?
Select an answer first
18foundation · easy
In an IPsec VPN, how does CoS typically handle DSCP values in the inner and outer IP headers?
Select an answer first
19application · medium
An enterprise uses an IPsec VPN to connect its headquarters to a remote site. The VPN carries mission-critical database traffic and less critical web browsing. The network team wants to ensure that database traffic is never dropped during congestion, while web browsing can be dropped if necessary. They have configured a firewall filter to classify database traffic into the 'expedited-forwarding' forwarding class and web browsing into 'best-effort'. What additional configuration is required on the tunnel interface to enforce this behavior?
Select an answer first
20foundation · easy
When configuring CoS marking for IPsec traffic, what does the 'marking' action do?
Select an answer first

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