Actualtests CCIE 350-001
350-001 : Cisco Certified Internetworking Expert Last Updated Monday, August 25, 2008 with 384 Questions
CCIE-ROUTING AND SWITCHING QUALIFICATION (Written exam)
Exam Number: 350-001 Exam
Associated Certifications: CCIE-ROUTING AND SWITCHING QUALIFICATION (Written exam)
Duration: 315 Q&As
Available Language(s): English
Exam Details
The written exam is a two-hour, multiple choice test with 100 questions covering Routing and Switching networking theory related to topics such as IP, IP routing, non-IP desktop protocols, bridging and switch-related technologies, and includes some equipment commands. The exam is closed book and no outside reference materials are allowed.
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QUESTION 1
Under the OSPF process of your router’s configuration, you type in “redistribute
igrp 25 metric 35 subnets” in order to redistribute your OSPF and IGRP routing
information. What affect did the “subnets” keyword have in your configuration
change?
A. It resulted in OSPF recognizing non-classful networks.
B. It had no effect since IGRP will summarize class boundaries by default.
C. It forced IGRP into supporting VLSM information.
D. It caused OSPF to accept networks with non-classful masks.
Answer: D
Explanation:
Whenever there is a major net that is subnetted, you need to use the keyword subnet to
redistribute protocols into OSPF. Without this keyword, OSPF only redistributes major
network boundaries. It is possible to run more than one OSPF process on the same router,
but running more than one process of the same protocol is rarely needed, and it consumes
the router’s memory and CPU.
Incorrect Answers:
A. OSPF already always recognizes non-classful networks and their VLSM information.
B. Although IGRP does indeed summarize by class boundaries, OSPF does not by
default. The “subnets” keyword enables OSPF to use VLSM information from the IGRP
routes.
C. IGRP does not support VLSM routing information.
QUESTION 2
Which routing protocols do not need to have their router ID reachable by other routers
within any given network in order to maintain proper network connectivity? (Choose all
that apply)
A. EIGRP
B. OSPF
C. BGP
D. LDP
E. TDP
F. None of the above
Answer: A, B, C
Explanation:
The router ID of each router does not necessarily need to be reached by other routers in
the network for EIGRP and OSPF. BGP uses TCP as the reliable exchange of
information between routers, and BGP routers do not need to even be directly connected.
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Incorrect Answers:
D, E. LDP and TDP are not routing protocols.
QUESTION 3
Which of the following does On Demand Routing use to transport ODR information from
router to router?
A. RIP
B. BGP
C. CDP
D. UDP
E. LSP
Answer: C
Explanation:
ODR uses information from the Cisco Discovery Protocol (CDP).
Incorrect Answers:
A, B, D, E. ODR has nothing to do with RIP, BGP, UDP, or LSP.
QUESTION 4
A router running multiple protocols learns how to reach a destination through numerous
different methods. Which of the following information will the router use first to
determine the best way to reach the given destination?
A. The length of the network mask of a route.
B. The administrative distance of a route.
C. The metric of a route.
D. None of the above.
Answer: A
Explanation:
Refer to the following example:
Let’s look at three routes that have just been installed in the routing table, and see how
they look on the router.
router# show ip route
….
D 192.168.32.0/26 [90/25789217] via 10.1.1.1
R 192.168.32.0/24 [120/4] via 10.1.1.2
O 192.168.32.0/19 [110/229840] via 10.1.1.3
….
If a packet arrives on a router interface destined for 192.168.32.1, which route would the
router choose? It depends on the prefix length, or the number of bits set in the subnet
mask. Longer prefixes are always preferred over shorter ones when forwarding a packet.
In this case, a packet destined to 192.168.32.1 is directed toward 10.1.1.1, because
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192.168.32.1 falls within the 192.168.32.0/26 network (192.168.32.0 to 192.168.32.63).
It is chosen based on the longest match, not the fact that it has a lower AD. It also falls
within the other two routes available, but the 192.168.32.0/26 has the longest prefix
within the routing table (26 bits verses 24 or 19 bits).
Likewise, if a packet destined for 192.168.32.100 arrives on one of the router’s interfaces,
it’s forwarded to 10.1.1.2, because 192.168.32.100 doesn’t fall within 192.168.32.0/26
(192.168.32.0 through 192.168.32.63), but it does fall within the 192.168.32.0/24
destination (192.168.32.0 through 192.168.32.255). Again, it also falls into the range
covered by 192.168.32.0/19, but 192.168.32.0/24 has a longer prefix length.
Incorrect Answers:
B, C: The administrative distance and metric is consulted only for routes with the same
network mask length.
Reference:
www.cisco.com/en/US/tech/ CK3 65/technologies_tech_note09186a0080094823.shtml
QUESTION 5
Which of the following are key differences between RIP version 1 and RIP version 2?
(Choose all that apply)
A. RIP version 1 supports authentication while RIP version 2 does not.
B. RIP version 2 uses multicasts while RIP version 1 does not.
C. RIP version 1 uses hop counts as the metric while RIP version 2 uses bandwidth
information.
D. RIP version 1 does not support VLSM while RIP version 2 does.
E. RIP version 1 is distance vector while RIP version 2 is not.
F. None of the above are true
Answer: B, D
Explanation:
Both Classless Routing and Multicast updates (224.0.0.9) were impossible with RIP v1
and are available with RIP version 2.
Incorrect Answers:
A. RIPv2 supports neighbor authentication. RIPv1 does not support this.
C. Both RIP version use hop counts as the metric.
E. Both RIP versions are distance vector routing protocols.
QUESTION 6
You are deciding which routing protocol to implement on your network. When weighing
the different options, which of the following are valid considerations?
A. Distance vector protocols have a finite limit of hop counts whereas link state protocols
place no limit on the number of hops.
B. Distance vector protocols converge faster than link state protocols.
C. RIP is a distance vector protocol. RIP v2 and OSPF are link state protocols.
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D. Distance vector protocols only send updates to neighboring routers. Link state
protocols depend on flooding to update all routers in the within the same routing domain.
E. None of the above
Answer: A
Explanation:
Only A is true.
Incorrect Answers:
B. Link state protocols have the benefit of better convergence than distance vector
protocols.
C. RIPv2 is a distance vector protocol, just like RIP version 1.
D. Link state protocols do not flood updates to every router within the same domain, just
within their area.
QUESTION 7
The Certkiller network contains two routers named Router CK1 and Router CK2 as
shown in the following exhibit:
Both Router CK1 and Router CK2 are running RIPv1. Both routers are configured to
advertise all of their attached networks via RIP. Which of the networks connected to
Router CK2 will be advertised to Router CK1 ?
A. 10.10.10.0/27 and 134.10.15.0/28
B. 10.0.0.0/8 and 192.75.0.0/24
C. 134.10.15.0/28 and 192.75.0.0/22
D. Only 10.0.0.0/8
E. Only 134.10.15.0/28
F. Only 10.10.10.0/27
G. None of the above
Answer: D
Explanation:
Only one subnet 10.0.0.0/8 will be advertised.
In this scenario we are being tested on the following concepts:
RIP V1 performs auto summarization at network boundaries by default. It treats the
subnets to be advertised differently depending upon several attributes of the respective
subnets.
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Here is the process RIP v1 uses to advertise, assuming that there are no filters (such as
distribute-lists, or route-maps) to block the packet:
Is the route to be advertised part of the major network of the interface?
If it is, then advertise. If it is not, then summarize the network to its classful boundary
and send it out.
This is the fate of the 10.10.10.0/27 subnet, which will be summarized as 10.0.0.0/8
and sent out.
Incorrect Answers:
A, C, E. If the route is part of the major network, check to see of the subnet mask
matches that of the outgoing interface. If the subnet mask does match then advertise the
route out the interface. If the subnet mask of the route does not match the interface’s
subnet mask, then do not advertise the route out the interface unless the route is a host
route (/32). This is the fate of the 134.10.15.0/28 subnet, which will not be sent out
(advertised) at all.
B, C. Super net advertisement (advertising any network prefix less than its classful major
network) is not allowed in RIP route summarization. This is the fate of the 192.75.1.2/22
subnet, which will be not be sent out (advertised) at all.
F. The 10.10.10.0/27 network will be summarized and sent as10.0.0.0/8.
Please note:
If the route is a host route then advertise it out.
QUESTION 8
You are the network administrator at Certkiller . The Routing protocols which run
between the different routers in the Certkiller network are shown in the following exhibit:
On Router CK3 RIPv2 is being redistributed into EIGRP. No other redistribution is done
to the network.
With regard to this scenario, who owns the route for subnet 100.10.1.0/24 in the routing
table of Router CK1 ?
A. Nobody, because the route is neither in the routing table of Router CK1 , nor EIGRP
topology table.
B. External EIGRP.
C. The route is only in the EIGRP topology table only and not in the routing table of
Router CK1 .
D. Internal EIGRP.
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E. The route is only but is in the EIGRP topology table as an active route and not in the
routing table of Router CK1 .
Answer: B
Explanation:
External EIGRP will own the route, because the route is from outside the AS. Routes that
are redistributed into EIGRP are automatically considered external EIGRP routes.
Incorrect Answers:
A. Since RIPv2 allows for VLSM information to be carried in the route, there are no
concerns about the route not being advertised due to summarization. Since RIPv2 is
being redistributed into EIGRP, CK1 will learn about the route via CK2 and CK3 .
C, E. This route will be in both the EIGRP table, as well as the IP routing table.
D. Redistributed routes always show up as External routes.
Note: From the perspective of router CK1 , all routes are EIGRP learned, since that is the
only protocol running on this router. Although the AD of RIP is lower than external
EIGRP routes, RIP is not being configured on CK1 so it will not learn this route via RIP.
QUESTION 9
The router topology for the multi-protocol Certkiller network is shown in the
following exhibit:
The current configuration for Router CK1 , Router CK2 , Router CK3 , and Router
CK4 are as follows:
Router CK1 :
interfaceloopback0
ip address 1.1.1.1 255.255.255.255
routereigrp 10
network 1.0.0.0
network 10.0.0.0
interface loopback1
ip address 4.4.4.4 255.255.255.255
Router CK2
routereigrp 10
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network10.0.0.0
network20.0.0.0
noauto-summary
Router CK3
routerospf 10
network30.30.30.0 0.0.0.255 area 0
network40.40.40.0 0.0.0.255 area 0
Router CK4
routereigrp 10
redistribute connected metric 1400 230 1 255 1500
network 20.0.0.0
no auto-summary
routerospf 10
redistribute connected metric 100 subnets
network 40.40.40.0 0.0.0.255 area 0
routerbgp 10
network 100.10.1.0 mask 255.255.255.0
neighbor 1.1.1.1 remote-as 10
neighbor update-source loopback
no auto-summary
Your newly appointed Certkiller trainee wants to know who owns the subnet
100.10.1.0/24 in the routing table of Router CK1 .
What would your reply be?
A. Router CK1 does not have this subnet in its routing table.
B. EIGRP
C. OSPF
D. BGP
E. RIP
F. It is there as a static route.
Answer: B
Explanation:
Routers CK1 , CK2 , and CK4 are all EIGRP neighbors with all relevant subnets
advertised, so this route will show up as an EIGRP route.
Incorrect Answers:
C, D, E. Router CK1 is only running the EIGRP protocol, so the other routing protocols
are completely ruled out.
QUESTION 10
Which of the following are Distance Vector routing protocols? (Choose all that
apply)
A. OSPF
B. BGP
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C. RIP version 1
D. ISIS
E. EIGRP
F. RIP version 2
Answer: C, E, F
Explanation:
Both RIP version 1 and RIP version 2 are distance vector protocols.
EIGRP is an enhanced distance vector protocol, relying on
the Diffused Update Algorithm (DUAL) to calculate the shortest path to a
destination within a network
Incorrect Answers:
A, D. OSPF and ISIS are link state routing protocols.
B. BGP is a path vector protocol, which is similar to a distance vector protocol, but with
a key difference. A distance vector protocol chooses routes based on hop count, where
BGP chooses routes that traverse the least number of Autonomous Systems, among other
things.
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