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Exam Number/Code: 642-825
Exam Name: ISCW – Implementing Secure Converged Wide Area Networks
VUE Code: 642-825
Questions Type: Single choice,
Exam Language(s): English

642-825 ISCW
Implementing Secure Converged Wide Area Networks

Exam Number: 642-825
Associated Certifications: CCNP
Duration: 90 minutes
Available Languages: English
Click Here to Register: Pearson VUE
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Exam Description Introduction Exam Topics Recommended Training Additional Resources
Exam Description Introduction
The 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.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Implement basic teleworker services.
Describe Cable (HFC) technologies.
Describe xDSL technologies.
Configure ADSL (i.e., PPPoE or PPPoA).
Verify basic teleworker configurations.

Implement Frame-Mode MPLS.
Describe the components and operation of Frame-Mode MPLS (e.g., packet-based MPLS VPNs).
Configure and verify Frame-Mode MPLS.

Implement a site-to-site IPSec VPN
Describe the components and operations of IPSec VPNs and GRE Tunnels.
Configure a site-to-site IPSec VPN/GRE Tunnel with SDM (i.e., preshared key).
Verify IPSec/GRE Tunnel configurations (i.e., IOS CLI configurations).
Describe, configure, and verify VPN backup interfaces.
Describe and configure Cisco Easy VPN solutions using SDM.

Describe network security strategies.
Describe and mitigate common network attacks (i.e., Reconnaissance, Access, and Denial of Service).
Describe and mitigate Worm, Virus, and Trojan Horse attacks.
Describe and mitigate application-layer attacks (e.g., management protocols).

Implement Cisco Device Hardening
Describe, Configure, and verify AutoSecure/One-Step Lockdown implementations (i.e., CLI and SDM).
Describe, configure, and verify AAA for Cisco Routers.
Describe and configure threat and attack mitigation using ACLs.
Describe and configure IOS secure management features (e.g., SSH, SNMP, SYSLOG, NTP, Role-Based CLI, etc.)

Implement Cisco IOS firewall.
Describe the functions and operations of Cisco IOS Firewall (e.g., Stateful Firewall, CBAC, etc.).
Configure Cisco IOS Firewall with SDM.
Verify Cisco IOS Firewall configurations (i.e., IOS CLI configurations, SDM Monitor).

Describe and configure Cisco IOS IPS.
Describe the functions and operations of IDS and IPS systems (e.g., IDS/IPS signatures, IPS Alarms, etc.)
Configure Cisco IOS IPS using SDM.

“ISCW – Implementing Secure Converged Wide Area Networks”, also known as 642-825 exam, is a Cisco certification.
Preparing for the 642-825 exam, Searching 642-825 Test Questions, 642-825 Exam, 642-825 Dumps

With the complete collection of questions and answers Q&as with Expert Explanations, Pass4sure has assembled to take you through 172 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.

The 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 16:
What’s true about the G.Lite (G.922) ADSL ITU standard?
A. It offers equal bandwidth for upstream and downstream data traffic.
B. It has limited operating range of less than 4,500 feet.
C. It was developed specifically for the consumer market segment requiring higher
download speeds.
D. Signals cannot be carried on the same wire as POTS signals.
E. All of the above
Answer: C
Explanation:
G.Lite is the informal name for what is now a standard way to install Asymmetric Digital
Subscriber Line (ADSL) service. Also known as Universal ADSL, G.Lite makes it
possible to have Internet connections to home and business computers at up to 1.5 Mbps
(millions of bits per second) over regular phone lines. Even at the lowest downstream
rate generally offered of 384 Kbps (thousands of bits per second), G.Lite is about seven
times faster than regular phone service with a V.90 modem and three times faster than an
Integrated Services Digital Network (ISDN) connection. Upstream speeds from the
computer are at up to 128 Kbps. (Theoretical speeds for ADSL are much higher, but the
data rates given here are what is realistically expected.)
With G.Lite, your computer’s analog-to-digital modem is replaced with an “ADSL
modem.” and the transmission from the phone company is digital rather than the analog
tranmission of “plain old telephone service.” G.Lite is also known as “splitterless DSL”
because, unlike other DSL technologies, it does not require that a technician come to
install a splitter, a device that separates voice from data signals, at the home or business
(sometimes referred to as “the truck roll”).
The G.Lite standard is officially known as G.992.2.
DSL technologies can be broken down into two fundamental classifications: asymmetric
(ADSL) and symmetric (SDSL). As the name implies, ADSL uses higher downstream
rates and lower upstream rates. In contrast, SDSL uses the same downstream and
upstream rates. ADSL is the most commonly deployed DSL technology, and is the
primary focus of the DSL portion of the CCNP Remote Access Exam.
642-825
www.actualtest.org – The Power of Knowing
DSL is a highly distance-sensitive technology. As the distance from the CO increases, the
signal quality and connection speeds decrease. ADSL service is limited to a maximum
distance of 18,000 feet (5460 m) between the DSL CPE and the DSLAM, although many
ADSL providers place an even lower limit on the distance to ensure quality.
References:
Cisco Press – BCRAN – 642-821 – Exam Certification Guide 2004 (ISBN 1-58720-084-8)
Page 245 to 247

http://whatis.techtarget.com/definition/0,,sid9_gci212198,00.html

QUESTION 17:
When designing an ADSL network; if you want minimal local loop impairments,
what should be the maximum distance of your lines?
A. 1000 feet (0.3 km)
B. 4000 feet (1,5 km)
C. 12,000 feet (3.65 km)
D. 18,000 feet (5,5 km)
E. 28,000 feet (8.52 km)
Answer: D
Explanation:
DSL is a highly distance-sensitive technology. As the distance from the CO increases, the
signal quality and connection speeds decrease. ADSL service is limited to a maximum
distance of 18,000 feet (5460 m) between the DSL CPE and the DSLAM, although many
ADSL providers place an even lower limit on the distance to ensure quality. The
18,000-foot distance limitation for DSL is not a limitation for voice telephone calls, but
for data transmission. The telco uses small amplifiers, called loading coils, to boost voice
signals. Loading coils have a nasty tendency to disrupt DSL data signals. This means that
if there are loading coils in the loop between the CPE and CO, you probably are not
within an area that can receive DSL service.
Reference:
Cisco Press – BCRAN – 642-821 – Exam Certification Guide 2004 (ISBN 1-58720-084-8)
Page 247
QUESTION 18:
A new ADSL line is being installed in the home office of the PassGuide administrator.
What best describes ADSL?
A. Equal upload and downloads speeds.
B. Slow upload, fast download speeds.
C. An ISDN line with no D channel.
642-825
www.actualtest.org – The Power of Knowing
D. Used as a T-1 replacement.
Answer: B
Explanation:
The variation called ADSL (Asymmetric Digital Subscriber Line) is the form of DSL that
will become most familiar to home and small business users. ADSL is called
“asymmetric” because most of its two-way or duplex bandwidth is devoted to the
downstream direction, sending data to the user. Only a small portion of bandwidth is
available for upstream or user-interaction messages. However, most Internet and
especially graphics- or multi-media intensive Web data need lots of downstream
bandwidth, but user requests and responses are small and require little upstream
bandwidth. Using ADSL, up to 6.1 megabits per second of data can be sent downstream
and up to 640 Kbps upstream. The high downstream bandwidth means that your
telephone line will be able to bring motion video, audio, and 3-D images to your
computer or hooked-in TV set. In addition, a small portion of the downstream bandwidth
can be devoted to voice rather data, and you can hold phone conversations without
requiring a separate line.
Reference:

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213915,00.html

QUESTION 19:
Which two statements are true about DSL? (Choose two)
A. SDSL and POTS can work together.
B. It uses the unused bandwidth of your existing phone line.
C. Bandwidth is shared among users in the same geographical area.
D. ADSL has a maximum distance limitation of 18,000 feet from the CO.
E. None of the above
Answer: B, D
Explanation:
DSL is a very high-speed connection that uses the same wires as a regular telephone line.
642-825
www.actualtest.org – The Power of Knowing
Precisely how much benefit you see will greatly depend on how far you are from the
central office of the company providing the ADSL service. ADSL is a distance-sensitive
technology: As the connection’s length increases, the signal quality decreases and the
connection speed goes down. The limit for ADSL service is 18,000 feet (5,460 meters)
from the central office, though for speed and quality of service reasons many ADSL
providers place a lower limit on the distances for the service. At the extremes of the
distance limits, ADSL customers may see speeds far below the promised maximums,
while customers nearer the central office have faster connections and may see extremely
high speeds in the future. ADSL technology can provide maximum downstream (Internet
to customer) speeds of up to 8 megabits per second (Mbps) at a distance of about 6,000
feet (1,820 meters), and upstream speeds of up to 640 kilobits per second (Kbps). In
practice, the best speeds widely offered today are 1.5 Mbps downstream, with upstream
speeds varying between 64 and 640 Kbps.
QUESTION 20:
Two PassGuide routers are connected as shown below:
642-825
www.actualtest.org – The Power of Knowing
PassGuide 1 is configured as shown below:
Refer to the exhibit and the partial configuration on the PassGuide router.
The PassGuide DSL Router is connected to a service provider using a PPPoE session
over a DSL line. The FTP traffic, generated from inside the network 10.92.1.0/24,
fails to reach the PPPoE Server. What should be configured on the DSL Router to
fix the problem?
A. The ip mtu command with a bytes argument set greater than 1500 needs to be
configured for the Dialer1 interface.
B. The ip mtu command with a bytes argument set lower than 1500 needs to be
configured for the ATM0 interface.
C. The ip mtu command with a bytes argument set greater than 1500 needs to be
configured for the ATM0 interface.
D. The ip mtu command with a bytes argument set lower than 1500 needs to be
configured for the Dialer1 interface.
E. None of the above
Answer: D