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CCIE-ROUTING AND SWITCHING QUALIFICATION (Written exam) : 350-001 Exam

Exam Number/Code: 350-001
Exam Name: CCIE-ROUTING AND SWITCHING QUALIFICATION (Written exam)
VUE Code: 350-001
Questions Type: Single choice,
Question Numbers of Real-exam: 100 questions

“CCIE-ROUTING AND SWITCHING QUALIFICATION (Written exam)”, also known as 350-001 exam, is a Cisco certification.
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QUESTION 21
PassGuide has a frame-relay network with 2 sites; a headquarters site and a remote
site, each with a PVC connecting the 2 sites. The network is running RIPv2.
PassGuide is now expanding and adding another remote site in the frame relay
network and has ordered a second PVC between the new remote site and the
headquarters site. All frame-relay interface IP addresses are in a single subnet.
PassGuide has configured frame-relay DLCI mappings and can successfully ping
from the new remote to the headquarters site as well as the other remote site.
However, the new router does not have a route in its route table to the other remote
site’s LAN, and cannot ping the LAN interface or any hosts on that LAN. What is
most likely causing the problem?
A. Neighbor statements are not configured on the two remote sites, pointing to all other
sites.
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B. The headquarters site router has split-horizon enabled on the frame-relay interface.
C. The frame-relay IP to DLCI mappings are incorrectly configured.
D. RIP cannot propagate routing updates over a partial mesh frame-relay configuration,
so another routing protocol should be selected.
E. Triggered updates should be configured on the headquarters router, to directly forward
routing updates between the two remote sites.
F. None of the above
Answer: B
Explanation:
RIP version 2 is a distance vector routing protocols, and by default all distance vector
routing protocols utilize the split horizon rule to avoid routing loops. The split horizon
rule blocks routing updates to be sent over the same interface that the route was learned
from. In this case, the routes from the remote frame relay sites will not be sent to the
other remote locations. In a hub and spoke topology such as this, the only way to ensure
full connectivity between all locations using RIPv2 is to use sub-interfaces, or to disable
the use of split horizons on the physical serial interface.
QUESTION 22
Layer 6 of the OSI model is responsible for which of the following functions?
A. Common Data Compression and Encryption Schemes
B. Establishing, managing, and terminating communication sessions
C. Synchronizing communication
D. Determining resource availability
E. None of the above
Answer: A
Explanation:
Layer 6 is the Presentation Layer. This layer provides independence from differences in
data representation (e.g., encryption and compression) by translating from application to
network format, and vice versa. The presentation layer works to transform data into the
form that the application layer can accept. This layer formats and encrypts data to be sent
across a network, providing freedom from compatibility problems. It is sometimes called
the syntax layer.
Incorrect Answers:
B: This describes layer 5 of the OSI model, which is the Session Layer.
C, D: These are not responsibilities of the Presentation Layer.
QUESTION 23
Part of the configuration of router CK1 is shown below:
interface Ethernet0/0
ip address 10.1.1.1 255.255.255.0
ip summary-address rip 10.2.0.0 255.255.0.0
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half-duplex
!!
router rip
network 10.0.0.0
You have configured RIPv2 summarization on the CK1 interface Ethernet 0/0 but
the routes are still not being summarized. Based on the information provide above,
what could be causing the problem?
A. You need also to enable the auto summerazation under the RIP process.
B. You need also to disable the auto summerazation under the RIP process.
C. RIP does not support summarization on interface basis.
D. Split horizon is enabled on the Ethernet 0/0 interface
E. The mask configured on the “ip summary-address” command must be /24 bits.
F. None of the above
Answer: D
Explanation:
Cisco routers can summarize routes in two ways:
1. Automatically, by summarizing subprefixes to the classful network boundary when
crossing classful network boundaries (autosummary)
2. As specifically configured, advertising a summarized local IP address pool on the
specified interface.
Autosummary will override the configured summary-address feature on a given interface
except when both of the following conditions are true:
1. The configured interface summary-address and the IP address of the configured
interface share the same major network (the classful, nonsubnetted portion of the IP
address).
2. Split horizon is not enabled on the interface.
Note: If split horizon is enabled, neither an autosummary address nor the interface
summary-address is advertised.
In the following example configuration, the major network is 10.0.0.0. The 10 in the
address defines a Class A address space, allowing space for 0.x.x.x unique hosts where x
defines unique bit positions in the addresses for these hosts. The summary of the major
net defines the prefix as implied by the class (A, B, or C) of the address, without any
network mask. The summary address 10.2.0.0 overrides the autosummary address of
10.0.0.0, 10.2.0.0 is advertised out interface E1, and 10.0.0.0 is not advertised:
int Ethernet 0/0
ip address 10.1.1.1 255.255.255.0
ip summary-address rip 10.2.0.0 255.255.0.0
no ip split-horizon
router rip
network 10.0.0.0
The above configuration is what should have been configured on router CK1 , by
disabling split horizons.
Incorrect Answers:
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A, B: By default, automatic summarization is already enabled. In this example, we need
to disabled it. Automatic summarization is not the problem, however, since the manually
configured summary address will override the automatically summarized address.
C: To configure IP summary addressing, use the “ip summary-address rip ip_address
ip_network_mask” under the interface configuration:
E: The following subnet restrictions apply:
Supernet advertisement (advertising any network prefix less than its classful major
network) is not allowed in RIP route summarization, other than advertising a supernet
learned in the routing tables. Supernets learned on any interface that is subject to
configuration are still learned. For example, the following summarization is invalid:
interface E1
..
ip summary-address rip 10.0.0.0 252.0.0.0 (invalid supernet summarization)
Each route summarization on an interface must have a unique major net, even if the
subnet mask is unique. For example, the following is not permitted:
int E1
…
ip summary-address rip 10.1.0.0 255.255.0.0
ip summary-address rip 10.2.0.0 255.255.0.0 (or different mask)
However, the subnet mask used does not need to be a /24.
Reference:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configuration_guide_chapter09186a00800

d
QUESTION 24
The PassGuide multi-protocol network is displayed below:
Please study the exhibit carefully. Assume all necessary configurations are already
correct for routing. Subnet 10.1.1.0/24 is sourced by Router PassGuide 1 and
advertised via BGP, OSPF and EIGRP. Eventually, Router PassGuide 7 learns for
this subnet. What is the routing protocol and administrative distance that Router
PassGuide 7 used to reach subnet 10.1.1.0/24?
A. EIGRP, AD 5
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B. OSPF, AD 110
C. EIGRP, AD 90
D. EIGRP, AD 170
E. BGP, AD 20
F. BGP, AD 200
G. None of the above
Answer: E
Explanation:
In this example, router PassGuide 7 will learn this route via OSPF, EIGRP, and IBGP, and
external BGP. Since the administrative distance of EBGP is 20, this will be the preferred
route to the 10.1.1.0/24 network.
QUESTION 25
The PassGuide network is displayed below:
Based on the information above, what path would router PassGuide 8 use to reach a
network on router PassGuide 1? (Assume that mutual route redistribution takes place at all
protocol boundaries)
A. Router PassGuide 8 takes the path through PassGuide 6.
B. Router PassGuide 8 takes the path through PassGuide 4.
C. Router PassGuide 8 takes the path through PassGuide 3.
D. Router PassGuide 8 takes the path through PassGuide 2.
E. None of the above.
Answer: A