Question 1

A network hacker is trying to interrupt the transport packet on IPSEC. A packet with duplicate sequence numbers is introduced. The customer sends high-priority traffic during this window. Which design parameter should be considered to mitigate this issue?

Options :

A : Classify and Mark duplicate sequence packets.

B : Apply anti-replay window 4096.

C : Restrict keywork in IPSEC Tunnel.

D : Increase QoS shape policy.

Answer: B

Question 2

A customer with a dedicated Frame Relay network is planning to move its circuits onto a service provider MPLS network. Instead of moving to Ethernet access links right away, the customer wants to tunnel the Frame Relay information across the MPLS network using AToM pseudowire. How is QoS information transmitted across an AToM pseudowire?

Options :

A : QoS information is translated into the MPLS EXP bits in the MPLS header

B : QoS information is carried in a control word that is attached to the MPLS frame

C : QoS information is preserved in the Frame Relay header and encapsulated into the pseudowire frame

D : QoS information cannot be transported through a pseudowire and is dropped

Answer: B

Question 3

A mobile network operator is designing an NGN backhaul and plans to migrate their legacy SDH and SONET-based transport network. The NGN network must achieve similar failover and failback times as the legacy network (50 milliseconds). Which method does allow for similar failover and failback times on the new packet-based network?

Options :

A : BPDU

B : E-OAM

C : BFD

D : UDLD

Answer: C

Question 4

A retail company has 250 branches connected to the core via MPLS Layer 3 VPN. The company is migrating from traditional telephony services to a VoIP solution. Which two primary concerns when implementing a VoIP solution are true? (Choose two.)

Options :

A : jitter

B : available bandwidth

C : call routing design

D : MTU

E : SRST

Answer: A,B

Question 5

IPFIX data collection via standalone IPFIX probes is an alternative to flow collection from routers and

switches. Which use case is suitable for using IPFIX probes?\

Options :

A :

performance monitoring

B : security

C : observation of critical links

D : capacity planning

Answer: C

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