free p4s ccda latest version
Exam Number/Code: 640-861
Exam Name: CCDA
VUE Code: 640-861
Questions Type: Single choice, Multiple choice, Simulate,
Real Exam Question Numbers: 55-65 questions
Exam Language(s): English
Exam Description Introduction
The Designing Cisco Internetworking exam is the only exam required to achieve a CCDA (Cisco Certified Design Associate) certification.
Exam Topics
The following information provides general guidelines for the content likely to be included on the Designing Cisco Internetworking exam. However, other related topics may also appear on any specific delivery of the exam.
Analysis
Gather and evaluate information regarding an organization’s existing social requirements
Gather and evaluate information regarding a network owner’s current data network and future needs
Gather and evaluate information regarding a network owner’s current voice network and future needs
Identify possible opportunities for network improvement
Validate gathered information
Document relevant findings
Modeling
Given a network design or set of requirements evaluate a solution that meets IP addressing needs
Given a network design or a set of requirements evaluate a solution that meets routing protocol needs
Given a network design or a set of requirements evaluate a solution that meets network management needs
Given a network design or a set of requirements evaluate a solution to incorporate equipment and technology within a Campus design
Given a network design or a set of requirements evaluate a solution to incorporate equipment and technology within an Enterprise Edge design
Design solutions to meet network owner needs applying the Enterprise Composite Network Model
Evaluate solutions addressing the issues of delivering voice traffic over a data network
Evaluate solutions for compliance with SAFE architecture
Planning
Develop an implementation plan
Develop a prototype testing plan
Develop a verification plan
“CCDA”, also known as 640-861 exam, is a Cisco certification.
Preparing for the 640-861 exam Searching 640-861 Test Questions, 640-861 Exam, 640-861 Dumps
With the complete collection of questions and answers Q&as with Expert Explanations, Pass4sure has assembled to take you through 198 questions to your 640-861 Exam preparation. In the 640-861 exam resources, you will cover every field and category in CCDA helping to ready you for your successful Cisco Certification.
QUESTION 16:
What are three valid methods of gathering information about an existing data
network? (Choose three)
A. Perform an audit at packet level detail (PLD) and for carrier service guarantees.
B. Use organizational input.
C. Perform a network audit to gather more detailed information of the network.
D. Analyze the user-mapping of a running application.
E. Perform a traffic analysis.
F. Use reports that have the ability to measure metrics.
Answer: C, D, E
Explanation:
The network information gathering aspects of the design phase comprise the following
steps:
1. Performing a network audit
2. Performing traffic analysis
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3. Analyzing user applications
All of the above steps should be taken when gathering data about an existing network.
QUESTION 17:
Two different PassGuide networks are displayed below:
The two networks shown in the diagram have very different traffic patterns, as
illustrated by the black arrows. Network A has two departments organized in
separate VLANs. Each department VLAN contains the servers and printers that are
used by the department personnel. The only common resource used by both
departments is the email server, located on a remote network. Network B also has
two departments organized in separate VLANs. All of the applications used by both
departments are located on common database servers. The common database
servers are located in a server farm on a separate network from the users. Which
three statements are true about the networks in this diagram? (Choose three)
A. Network A is designed to accommodate file transfers from other department servers
on a frequent basis.
B. The design in Network B will require a higher performance Layer 3 switch.
C. Network B illustrates the 20/80 rule.
D. Network B is designed so that distribution layer switches concentrate users in their
own VLANs.
E. Network A is designed to keep 80% of the traffic within the local workgroup.
F. Network A is designed to have 80% of the traffic pass through the Layer 3 switches.
Answer: B, C, E
Explanation:
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The 80/20 rule states that 80 percent of the traffic is “local” to the workgroup while 20
percent is remote or outside of the workgroup. In theory, by properly configuring VLANs
or by using layer 3 devices to match workgroups, only the 20 percent of the traffic that is
not local will need to pass through a router and out of the workgroup, improving
performance for the 80 percent of the traffic that is within the workgroup. As shown by
the traffic patterns pertaining to these two networks, only network A correctly represents
this 80/20 rule, while network B shows the 20/80 rule.
In network B, a layer 3 switch should be added to increase network performance, while
also decreasing the amount of broadcast traffic.
QUESTION 18:
Which of the following features will you affect when you choose a codec in your
network design to carry IP telephony? (Choose all that apply.)
A. Voice packet header size
B. Bandwidth necessary for voice calls
C. Voice quality
D. Silence packet handling
E. All of the above.
Answer: B, C
Explanation:
The Codec that is chosen for VOIP will directly impact the bandwidth needed for each
call, as well as the quality of that VOIP call. Generally, the codec that uses the least
amount of bandwidth also has the worst voice quality. Below are the three most
commonly used VOIP codecs:
Standard Packet Size Sample
Duration
Data Rate
Bits
PPS
Simplex
G.711 120 15ms 64K 66
G.729A 10 10ms 8K 100
G.723.1 24 30ms 5.3/6.4K 33
Incorrect Answers:
A: This will not play any role for deciding codec
D: This is not main characteristic of codec
E: This is not a valid option.
QUESTION 19:
You are the network administrator at PassGuide . You are planning trunk capacity
for the PassGuide network. You need to determine the number of circuits needed
from a PBX to a converged network.
Which information would you require to make this decision? (Choose all that
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apply.)
A. Busy hour traffic.
B. The number of sites.
C. Blocking probability (GoS).
D. The number of users per site.
E. The average duration of a call.
Answer: A, C
Explanation:
A: Measure network traffic load during the busiest hour because this period represents
the maximum traffic load that your network must support. The result gives you a traffic
load measurement commonly referred to as the Busy Hour Traffic (BHT).
C: Grade of Service (GoS) is defined as the probability that calls will be blocked while
attempting to seize circuits. It is written as P.xx blocking factor or blockage, where xx is
the percentage of calls that are blocked for a traffic system.
Incorrect Answers
B: Number of sites will give an idea for sizing the PBX
D: This will not play major role.
E: Most traffic models do not consider call duration. Call holding times are assumed to
be exponential.
QUESTION 20:
To minimize expenses due to long distance charges, you designed a converged
network to carry calls on-net as close as possible to the destination.
Why can a VoIP call go off-net earlier that designed? (Choose two.)
A. The local voice gateway sends busy-back signal.
B. The Call Manager server is too busy to process the call in a usual manner.
C. The telephone user dials an access code.
D. Destination routing not properly setup on the local and remote gateways.
Answer: A, C
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