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ISCW – Implementing Secure Converged Wide Area Networks : 642-825 Exam

Exam Number/Code: 642-825
Exam Name:ISCW – Implementing Secure Converged Wide Area Networks

“ISCW – Implementing Secure Converged Wide Area Networks”, also known as 642-825 exam, is a Cisco certification. With the complete collection of questions and answers Q&as with Expert Explanations, Pass4sure has assembled to take you through 310 Q&As to your 642-825 Exam preparation. In the 642-825 exam resources, you will cover every field and category in CCNP helping to ready you for your successful Cisco Certification.
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VCE PDF EPAD bootcamp training bible DetailsThe Implementing Secure Converged Wide Area Networks (ISCW 642-825) is a qualifying exam for the Cisco Certified Network Professional CCNP®. The ISCW 642-825 exam will certify that the successful candidate has important knowledge and skills necessary to secure and expand the reach of an enterprise network to teleworkers and remote sites with focus on securing remote access and VPN client configuration. The exam covers topics on Cisco hierarchical network model as it pertains to the WAN, teleworker configuration and access, frame mode MPLS, site-to-site IPSEC VPN, Cisco EZVPN, strategies used to mitigate network attacks, Cisco device hardening and IOS firewall features.

QUESTION 36:
The Cisco VPN client needs to be installed and configured on a new PassGuide PC.
When entering the Group Authentication information while configuring the Cisco
VPN Client on a PC, what information is entered in the “Name” field?
A. Login name of the user (such as “joesmith”)
B. IPSec group information (such as “Engineering”)
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C. Host name of the remote VPN device (such as “vpn1.cisco.com”)
D. Client name of the device (such as “joesmith-laptop”)
E. The group pre-shared secret (such as “ClEiN1iNFTW”)
F. None of the above
Answer: B
Explanation:
Group Authentication:
Step 1 Select the Group Authentication radio button.
Step 2 In the Name field, enter the name of the IPsec group to which you belong. This entry is
case-sensitive.
Step 3 In the Password field, enter the password (which is also case-sensitive) for your IPsec
group. The field displays only asterisks.
Step 4 Verify your password by entering it again in the Confirm Password field.
QUESTION 37:
The following output was seen on a PassGuide DSL router:
You work as a network engineer at PassGuide .com. You are troubleshooting a DSL
connectivity issue. You have issued the show dsl interface command and received
the above output. Given this information, what could be the problem?
A. An incorrect power supply is being used.
B. The service provider is not providing DSL service to this wall jack.
C. Incorrect VPI/VCI values are configured on the router.
D. The service provider is using a DSLAM that does not support the Alcatel DSL
chipset.
E. None of the above
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Answer: C
Explanation:
If you experience trouble with the ADSL connection, make sure to verify the following:
That the ADSL line is connected and is using pins 3 and 4. For more information on the
ADSL connection, see the hardware guide for your router.
That the ADSL CD LED is on. If it is not on, the router may not be connected to the
digital subscriber line access multiplexer (DSLAM). For more information on the ADSL
LEDs, see the hardware installation guide specific to your router.
That you are using the correct Asynchronous Transfer Mode (ATM) variable path
indentifier/variable circuit identifier (VPI/VCI).
That the DSLAM supports discrete multi-tone (DMT) Issue 2.
Incorrect Answers:
A: The power outputs shown are normal
B: This is incorrect, due to the operational status of the modem as displayed by the
“showtime” keyword.
D: In this example, the Alcatel chipset is configured, with the Globespan chipset
configured as the secondary chipset. If this was not supported, the modem status would
not read “showtime.”
QUESTION 38:
The different PassGuide locations are connected via an MPLS network. Which device
is responsible for attaching a VPN label to a packet traversing an MPLS network?
A. The customer (C) router
B. The provider (P) router
C. The customer edge (CE) router
D. The provider edge (PE) router
E. None of the above
Answer: D
Explanation:
MPLS is a switching mechanism that assigns labels (numbers) to packets, then uses those labels
to forward packets. The labels are assigned at the edge of the MPLS network, and forwarding
inside the MPLS network is done solely based on labels.
You can use an MPLS label stack to tell the egress PE router what to do with the VPN
packet. When using the label stack, the ingress PE router labels the incoming IP packet
with two labels:
1. The top label in the stack is the Label Distribution Protocol (LDP) label for the egress
PE router. This label guarantees that the packet will traverse the MPLS VPN backbone
and arrive at the egress PE router.
1. The second label in the stack is assigned by the egress PE router and tells the router
how to forward the incoming VPN packet. The second label could point directly toward
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an outgoing interface, in which case the egress PE router would perform label lookup
only on the VPN packet. The second label could also point to a VRF table, in which case
the egress PE router would first perform a label lookup to find the target VRF table and
then perform an IP lookup within the VRF table.
QUESTION 39:
If a PassGuide Label Switch Router (LSR) is properly configured, which three
combinations are possible? (Select three)
A. An IP destination exists in the IP forwarding table. A received labeled packet is
dropped because the label is not found in the LFIB table.
B. A received labeled packet is forwarded based on the label. After the label is swapped,
the newly labeled packet is sent.
C. There is an MPLS label-switched path toward the destination. A received IP packet is
dropped because the destination is not found in the IP forwarding table.
D. A received IP packet is forwarded based on the IP destination address and the packet
is sent as an IP packet.
E. A received labeled IP packet is forwarded based upon both the label and the IP
address.
F. A received IP packet is forwarded based on the IP destination address and the packet is
sent as a labeled packet.
G. None of the choices above are possible
Answer: A, B, D
Explanation:
LSRs and edge LSRs are usually capable of doing both label switching and IP routing.
Their names are based on their positions in an MPLS domain. Routers that have all
interfaces enabled for MPLS are called LSRs because they mostly forward labeled
packets. Routers that have some interfaces that are not enabled for MPLS are usually at
the edge of an MPLS domain autonomous systems (ASs). These routers also forward
packets based on IP destination addresses and label them if the outgoing interface is
enabled for MPLS.
For example, an edge LSR receives a packet for destination 10.1.1.1, imposes label 21,
and forwards the frame to the LSR in the MPLS backbone. LSR swaps label 21 with
label 25 and forwards the frame. The edge LSR removes label 25 and forwards the packet
based on IP destination address 10.1.1.1.
LSRs of all types must perform these functions:
1. Exchange routing information (control plane)
2. Exchange labels (control plane)
3. Forward packets (data plane): Frame mode MPLS forwards packets based on the
32-bit label
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QUESTION 40:
PassGuide uses frame-mode MPLS in a portion of its WAN. Which statement is true
about the default operation of frame-mode MPLS?
A. LSRs must wait to get the next-hop label from their downstream neighbors before
propagating information.
B. LSRs will only propagate label mappings to their neighbors by request.
C. Labels are sequentially generated for neighbors.
D. Interfaces can share the same labels.
E. None of the above
Answer: D