Testking cisco 642-901
Vendor: cisco
Exam Code: 642-901
Exam Name: BSCI – Building Scaleable Cisco Internetworks (CCNP )
cisco 642-901 value pack
642-901 Q & A with Explanations + 642-901 Study Guide + 642-901 Preparation Labs
When we first started offering the 642-901 exam questions and answers and exam simulator, we never dreamed we would be making the claims that we do now in the form of our unbelievable guarantee. TestKing.com GUARANTEES that you will pass your 642-901 exam on your first attempt after using one of our 642-901 training products. That’s right, with the 100% pass rate, the exam tools that we have created for you are so good – we can’t help but guarantee your results.
Known also as the BSCI – Building Scaleable Cisco Internetworks (642-901 ), this exam plays an integral role in obtaining your certification. All cisco certification exams are extremely detailed and cover many different technological areas. We designed the 642-901 questions and answers for this very purpose, to prepare you for the unexpected. Beyond the testing center, the skills you learn and the knowledge you confirm using the 642-901 practice exams and exam simulators will translate directly into your daily work environment.
When available, take advantage of the TestKing 642-901 Real Exams and save time and money while developing your skills to pass your ‘BSCI – Building Scaleable Cisco Internetworks ‘ and grab that cisco certification. Let us help you climb that ladder of success and pass your 642-901 now!
Downloadable, Interactive 642-901 Testing engines
Our BSCI – Building Scaleable Cisco Internetworks Preparation Material provides you everything
you will need to take a CCNP
certification examination. Details are researched and produced by cisco Certification Experts
who are constantly using industry experience to produce precise, and logical.
Comprehensive questions with complete explanations about 642-901 braindumps
642-901 Actual Exams questions accompanied by exhibits
Verified Answers Researched by Industry Experts and almost 100% correct
642-901 exam questions updated on regular basis
Same type as the certification exams, 642-901 exam preparation is in multiple-choice questions (MCQs). Tested by multiple times before publishing
Try free 642-901 Tutorial demo before you decide to buy it in Testking.com
Search Help For Free Testking 642-901 dumps
cisco 642-901 rapidshare 4shared books
cisco 642-901 pdf
cisco 642-901 vce format
cisco 642-901 oline
cisco 642-901 Torrent
QUESTION 1:
Certkiller uses EIGRP as the primary routing protocol in their network. How does
EIGRP advertise subnet masks for each destination network?
A. EIGRP advertises a fixed length subnet mask for each destination network.
B. EIGRP advertises only a classful subnet mask for each destination network.
C. EIGRP, like IGRP and RIP, does not advertise a subnet mask for each destination
network.
D. EIGRP advertises a prefix length for each destination network.
E. None of the above
Answer: D
Explanation:
Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco-proprietary routing
protocol based on IGRP. Unlike IGRP, which is a classful routing protocol, EIGRP
supports CIDR, allowing network designers to maximize address space by using CIDR
and VLSM. Compared to IGRP, EIGRP boasts faster convergence times, improved
scalability, and superior handling of routing loops.
The prefix length field signifies the subnet mask to be associated with the network
number specified in the destination field. Thus, if an EIGRP router is configured as
follows:
1. ip address 172.16.1.1 255.255.255.0
it will advertise 172.16.1.0 with a prefix length of 24.
Likewise, if the router is configured as follows:
1. ip address 172.16.250.1 255.255.255.252
it will advertise 172.16.250.0 with a prefix length of 30.
QUESTION 2:
The Certkiller network uses EIGRP. Identify three characteristics of EIGRP feasible
successors? (Select three)
A. Traffic will be load balanced between feasible successors with the same advertised
distance.
B. If the advertised distance of the non-successor route is less than the feasible distance
of best route, then that route is identified as a feasible successor.
C. If the successor becomes unavailable, then the feasible successor can be used
immediately without recalculating for a lost route.
D. The feasible successor can be found in the routing table.
E. A feasible successor is selected by comparing the advertised distance of a
non-successor route to the feasible distance of the best route.
Answer: B, C, E
Explanation:
Once a neighbor relationship has been formed, called an Adjacency, the routers exchange
routing update information and each router builds its own topology table. The Updates
contain all the routes known by the sender. For each route, the receiving router calculates
a distance for that route based on the distance that is conveyed and the cost to that
neighbor that advertised the particular route. If the receiving router sees several routes to
a particular network with different metrics, then the route with the lowest metric becomes
the Feasible Distance (FD) to that network. The Feasible Distance is the metric of a
network advertised by the connected neighbor plus the cost of reaching that neighbor.
This path with the best metric is entered into the routing table because this is the quickest
way to get to that network.
With the other possible routes to a particular network with larger metrics, the receiving
router also receives the Reported Distance (RD) to this network via other routers. The
Reported Distance being the total metric along a path to a destination network as
advertised by an upstream neighbor. The Reported Distance for a particular route is
compared with the Feasible Distance that it already has for that route. If the Reported
Distance is larger than the Feasible Distance then this route is not entered into the
Topology Table as a Feasible Successor. This prevents loops from occurring. If the
Reported Distance is smaller than the Feasible Distance, then this path is considered to be
a Feasible Successor and is entered into the Topology table. The Successor for a
particular route is the neighbor/peer with the lowest metric/distance to that network.
If the receiving router has a Feasible Distance to a particular network and it receives an
update from a neighbor with a lower advertised distance (Reported Distance) to that
network, then there is a Feasibility Condition. In this instance, the neighbor becomes a
Feasible Successor for that route because it is one hop closer to the destination network.
There may be a number of Feasible Successors in a meshed network environment, up to 6
of them are entered into the Topology table thereby giving a number of next hop choices
for the local router should the neighbor with the lowest metric fail. What you should note
here, is that the metric for a neighbor to reach a particular network (i.e. the Reported
Distance) must always be less than the metric (Feasible Distance) for the local router to
reach that same network. This way routing loops are avoided. This is why routes that
have Reported Distances larger than the Feasible Distance are not entered into the
Topology table, so that they can never be considered as successors, since the route is
likely to loop back through that local router.
Incorrect Answers:
D: The feasible successors are found in the topology table, but not the active routing
table.
E: With EIGRP, traffic is load balanced across equal cost links in the routing table, but
not between feasible successors.
Reference: http://www.rhyshaden.com/eigrp.htm
QUESTION 3:
Two Certkiller EIGRP routers are attempting to establish themselves as neighbors.
Which EIGRP multicast packet type is responsible for neighbor discovery?
A. Update
B. Query
C. Acknowledgment
D. Reply
E. Hello
F. None of the above
Answer: E
Explanation:
Remember that simple distance vector routers do not establish any relationship with their
neighbors. RIP and IGRP routers merely broadcast or multicast updates on configured
interfaces. In contrast, EIGRP routers actively establish relationships with their
neighbors, much the same way that OSPF routers do.
EIGRP routers establish adjacencies with neighbor routers by using small hello packets.
Hellos are sent by default every five seconds. An EIGRP router assumes that as long as it
is receiving hello packets from known neighbors, those neighbors (and their routes)
remain viable. By forming adjacencies, EIGRP routers do the following:
1. Dynamically learn of new routes that join their network
2. Identify routers that become either unreachable or inoperable
3. Rediscover routers that had previously been unreachable
QUESTION 4:
Certkiller has chosen to use EIGRP for their network routing protocol. Which three
statements are true regarding EIGRP? (Select three)
A. By default, EIGRP uses the Dijkstra algorithm to determine the best path to a
destination network based on bandwidth and delay.
B. To speed convergence, EIGRP attempts to maintain a successor and feasible successor
path for each destination.
C. EIGRP uses hellos to establish neighbor relationships.
D. By default, EIGRP performs auto-summarization across classful network boundaries.
E. EIGRP uses an area hierarchy to increase network scalability.
Answer: B, C, D
Explanation:
EIGRP routers establish adjacencies with neighbor routers by using small hello packets.
Hellos are sent by default every five seconds. An EIGRP router assumes that as long as it
is receiving hello packets from known neighbors, those neighbors (and their routes)
remain viable. By forming adjacencies, EIGRP routers do the following:
1. Dynamically learn of new routes that join their network
2. Identify routers that become either unreachable or inoperable
3. Rediscover routers that had previously been unreachable
EIGRP routers keep route and topology information readily available in RAM so they
can react quickly to changes. Like OSPF, EIGRP keeps this information in several tables,
or databases.
* Successor – A successor is a route selected as the primary route to use to reach a
destination. Successors are the entries kept in the routing table. Multiple successors for a
destination can be retained in the routing table.
* Feasible successor – A feasible successor is a backup route. These routes are selected
at the same time the successors are identified, but are kept in the topology table. Multiple
feasible successors for a destination can be retained in the topology table.
EIGRP automatically summarizes routes at the classful boundary, the boundary where
the network address ends as defined by class-based addressing. In most cases, auto
summarization is a good thing, keeping the routing tables as compact as possible
In the presence of discontiguous subnetworks, automatic summarization must be disabled
for routing to work properly. To turn off auto-summarization, use the following
command:
Router(config-router)#no auto-summary
QUESTION 5:
You need to configure EIGRP on all routers within the Certkiller network. Which
two statements are characteristics of the routing protocol EIGRP? (Select two)
A. Updates are sent as broadcast.
B. Updates are sent as multicast.
C. LSAs are sent to adjacent neighbors.
D. Metric values are represented in a 32-bit format for granularity.
Answer: B, D
Explanation:
EIGRP routers establish adjacencies with neighbor routers by using small hello packets.
Hellos are sent by default every five seconds. An EIGRP router assumes that as long as it
is receiving hello packets from known neighbors, those neighbors (and their routes)
remain viable. By forming adjacencies, EIGRP routers do the following:
1. Dynamically learn of new routes that join their network
2. Identify routers that become either unreachable or inoperable
Testking 642-901
Questions and Answers : 179 Q&As
Updated: 2008-12-10
Price: $89.99
More info: Testking 642-901
More info: Pass4sure 642-901
| Free IT certification braindumps |
|
Type |
Exam Bible | New Questions & Answers |
Latest Updated |
Download link |
 |
All PassGuide 's Exam Pack |
397 |
5 days ago | Available |
Offer Latet PassGuide Certification Dumps
- Download Free Testking cisco 642-892
- Download Free Testking cisco 350-018-lab
- Download Free Ccna Cisco Discovery 3 Final
- Download Free Testking alcatel-lucent 4a0-102
- Download Free CCNA Lab 3 CDP Command Operations
- Download Free Testking cisco 642-053
- Download Free Testking cisco 642-831
- Download Free CBT Cisco CCIE Package (Video Labs)
- Download Free Testking cisco 642-812
- Download Free Testking cisco 642-481
- Download Free Testking cisco 640-801
- Download Free free Cisco ccnp TestKing 642-901 v10.0 by Krishnendu 470q.vce
- Download Free CCNA Practical Studies
- Download Free Testking cisco 642-381
- Download Free Cisco Express Forwarding
