Actual Tests 350-001 15-11-2012 by Spike 39Q · PDF file ... Which QoS mechanism wiII...

Actual_Tests_350-001_15-11-2012_by_Spike_39Q

Number: 350-001Passing Score: 800Time Limit: 120 minFile Version: 6.10

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CCIE Routingand Switching Written Exam v4.0

Cisco 350-001 Exam Version: 6.10

Exam A

QUESTION 1Which three configuration items are required to enable SSH on a router? (Choose three.)

A. a hostnameB. a RADIUS serverC. a username and passwordD. a self-signed certificateE. an RSA keyF. a domain name

Correct Answer: AEFSection: Explanation

Explanation/Reference:

QUESTION 2What is the default queuing mechanism on slow serial interfaces?

A. FIFOB. WFQC. WRRD. LLQE. CQ

Correct Answer: BSection: Explanation

Explanation/Reference:WFQ is used as the default queueing mode on most serial interfaces configured to run at E1 speeds(2.048Mbps) or below.WFQ provides the solution for situations in which it is desirable to provide consistent response time to heavyand light network users alike without adding excessive bandwidth.WFQ automatically adapts to changing network traffic conditions.

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conmgt/configuration/xe-3s/asr1000/qos-conmgt-oview.pdf

QUESTION 3Which value should be used in the configuration register of a router in order to boot into bootstrap?

A. 0x2102B. 0x2101C. 0x2124D. 0x2142



QUESTION 4Refer to the exhibit

R4#show run | sec VOICE class-map match-all VOICE match access-group name VOICE-ACL ip access-list extended VOICE-ACL permit udp any any range 16384 32787 dscp ef

On what will the class-map VOICE match?

A. only DSCP EF trafficB. both UDP traffic between port ranges 16384 and 32787 and DSCP EF trafficC. only UDP traffic between port ranges 16384 and 32787D. only EF traffic that is UDP and is within the UDP range 16384-32787

Correct Answer: DSection: Explanation


QUESTION 5Which value is used in the PIM TYPE field to indicate a register-stop message?


A. 2B. 1C. 3D. 0

Correct Answer: ASection: Explanation

Explanation/Reference:PIM-SM Packet Header

The header for a PIM-SM version 2 packet is shown in Figure 12 below.

Figure 12: PIM-SM version 2 packet header

The fields in the header have the following values:

Ver is the PIM version number. For version 2, the value is 2.

Type is the value associated with the particular control message(see Table 1 below).Reserved is transmitted as 0, It is ignored upon receipt.Checksum is the 16-bit one's complement of the one's complement sum of the entire PIM message(excluding the data portion in the Register message).

Each kind of control message has a different Type value, which is listed in Table 1 below.

Table 1 PIM-SM version 2 message types

QUESTION 6Which two statements are true about bandwidth guarantee? (Choose two)

A. When congestion is present, the priority command doesn't allow exceeding the allocated rateB. When congestion is present, the priority command allows exceeding the allocated rateC. When congestion isn't present, the priority command allows exceeding the allocated rateD. When congestion isn't present, the priority command doesn't allow exceeding the allocated rate

Correct Answer: ACSection: Explanation

Explanation/Reference:During congestion conditions, the traffic class is guaranteed bandwidth equal to the specified rate. (Recall thatbandwidth guarantees are only an issue when an interface is congested.)In other words, the priority command provides a minimum bandwidth guarantee. In addition, the prioritycommand implements a maximum bandwidth guarantee.Internally, the priority queue uses a token bucket that measures the offered load and ensures that the trafficstream conforms to the configured rate.Only traffic that conforms to the token bucket is guaranteed low latency. Any excess traffic is sent if the link isnot congested or is dropped if the link is congested.

Which Traffic Classes Can Use Excess Bandwidth?Although the bandwidth guarantees provided by the bandwidth and priority commands have been describedwith words like "reserved" and "bandwidth to be set aside", neither command implements a true reservation. In other words, if a traffic class is not using its configuredbandwidth, any unused bandwidth is shared among the other classes.The queueing system imposes an important exception to this rule with a priority class. As noted above, the

offered load of a priority class is metered by a traffic policer.During congestion conditions, a priority class cannot use any excess bandwidth.This table describes when a bandwidth class and a priority class can use excess bandwidth:

Referencehttp://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080103eae.shtml

QUESTION 7When using extended system ID in 802.1d, how many bits are reserved for this field?

A. 6B. 8C. 10D. 12


Explanation/Reference:Extended System ID and IEEE 802.1T

IEEE 802.1T spanning-tree extensions address the fact that the priority value is really too large. 802.1Tremedies these situations by using an extended system ID.The extended system ID was created in part to start to conserve MAC addresses. The IEEE 802.1d standardrequires that each bridge/switch have a unique BID.In PVST+, each VLAN requires a unique BID; therefore, the same switch must have as many unique BIDs asVLANs configured on it.This can cause a limit on the number of STP instances a switch can run. STP uses the extended system ID,the switch priority, and the allocated STP MAC addressto make a unique BID for each VLAN.

In Release 12.1(8)EA1 and later, Catalyst 3550 switches support the 802.1T spanning-tree extensions, andsome of the bits previously used for the priority are now usedas the extended system ID, which is set equal to the VLAN identifier. The result is that fewer MAC addressesare reserved for the switch, and a larger range of VLAN IDscan be supported, all while maintaining the uniqueness of the BID. Table 1-7 illustrates the switch priority valueand the extended system ID.

Table 1-7. Switch Priority Value and Extended System IDSwitch Priority Value Extended System ID (Set Equal to the VLAN ID)

From Table 1-7, the 2 bytes previously used for the switch priority (Figure 1-12) are re-allocated into a 4-bitpriority value and a 12-bit extended system ID value equal to the VLAN ID.To configure the switch to use the extended system ID, use the following global configuration command:

3550_switch(config)#spanning-tree extend system-id

The extended system ID is enabled by default on the Catalyst 3550 series switches.

If your switch is using the extended system ID, it will be noted with the show spanning-tree summary commandand it will appear in the configuration listing.

Reference:http://www.informit.com/library/content.aspx?b=CCIE_Practical_Studies_II&seqNum=13

QUESTION 8Refer to the exhibit.

AS65000 has core network P1 - P6.

The eBGP peers to another AS are through ASBR1-2 and ASBR3-4. All business and residential customersPOPs are currently connected to the P1-P2 core.AS65000 has decided to enable MPLS L3VPN services between all ASBR and PE routers. Which routers arethe best positioned as VPNv4 RR?

A. P1, since it is in the center of the MPLS networkB. a new pair of routers (RR1, RR2) dedicated as VPNv4 RR connected to P1, P2 since they are off the pathC. in MPLS L3VPN, there is no requirement to have VPNv4 RRD. ASBR1, ASBR2 and ASBR3, ASBR4, since they have eBGP peers to another AS




RTE is redistributing some static routes into OSPF as E2. Which LSA will be seen in RTA and RTB for thoseroutes?

A. LSA1B. RTA/RTB will not see any LSA for those routes, since this is NSSA and no external redistribution is allowedC. LSA5D. LSA7

Correct Answer: Section: Explanation

Explanation/Reference:???

QUESTION 10Which feature is used to translate several internal addresses to only one or a few external addresses (alsoreferred to as "overload")?

A. Address Translation TableB. Overload Address MethodC. Port Address TranslationD. Network Address Translation


Explanation/Reference:interface ethernet 0 ip address 10.10.10.1 255.255.255.0 ip nat inside!--- Defines Ethernet 0 with an IP address and as a NAT inside interface.interface ethernet 1 ip address 10.10.20.1 255.255.255.0 ip nat inside!--- Defines Ethernet 1 with an IP address and as a NAT inside interface.interface serial 0 ip address 172.16.10.64 255.255.255.0 ip nat outside!--- Defines serial 0 with an IP address and as a NAT outside interface.ip nat pool ovrld 172.16.10.1 172.16.10.1 prefix 24 !!--- Defines a NAT pool named ovrld with a range of a single IP !--- address, 172.16.10.1.ip nat inside source list 7 pool ovrld overload !

!--- Indicates that any packets received on the inside interface that !--- are permitted by access-list 7 has the source address !--- translated to an address out of the NAT pool named ovrld. !--- Translations are overloaded, which allows multiple inside !--- devices to be translated to the same valid IP address.access-list 7 permit 10.10.10.0 0.0.0.31access-list 7 permit 10.10.20.0 0.0.0.31!--- Access-list 7 permits packets with source addresses ranging from !--- 10.10.10.0 through 10.10.10.31 and 10.10.20.0 through 10.10.20.31.

QUESTION 11Which value is used in the PIM TYPE field to indicate a Register message?

A. 1B. 0C. 2D. 3



QUESTION 12On a Cisco router that is in ROMMON mode, how can you set the configuration register to its default value?

A. set confreg 0x2102B. confreg 0x2102C. config-register 0x2102D. set config-register 0x2102


Explanation/Reference:rommon 1 >confreg 0x2102

QUESTION 13Which QoS mechanism wiII rate-limit traffic, and limit drops by implementing queuing?

A. LLQB. Fair-QueueC. PolicerD. WREDE. Rate-LimitF. Shaper

Correct Answer: FSection: Explanation


QUESTION 14What does a unicast prefix-based IPv6 multicast address start with?

A. FF7B. FFC. FF80D. FF3


Explanation/Reference:The unicast prefix-based IPv6 multicast address format supports Source-specific multicast addresses, asdefined by [SSM ARCH]. To accomplish this, a node MUST:

These settings create an SSM range of FF3x::/32 (where 'x' is any valid scope value). The source address fieldin the IPv6 header identifies the owner of the multicast address. (RFC3306)

QUESTION 15Which value is used in the PIM TYPE field to indicate a Join/Prune message?

A. 1B. 2C. 0D. 3


Explanation/Reference:PIM-SM Packet Header

The header for a PIM-SM version 2 packet is shown in Figure 12 below.

Figure 12: PIM-SM version 2 packet header

The fields in the header have the following values:

Ver is the PIM version number. For version 2, the value is 2.Type is the value associated with the particular control message(see Table 1 below).Reserved is transmitted as 0, It is ignored upon receipt.Checksum is the 16-bit one's complement of the one's complement sum of the entire PIM message(excluding the data portion in the Register message).

Each kind of control message has a different Type value, which is listed in Table 1 below.

Table 1 PIM-SM version 2 message types

QUESTION 16

By default, EIGRP will use which percentage of bandwidth on an interface?

A. 75%B. 50%C. 100%D. 10%E. 25%F. 80%


Explanation/Reference:The bandwidth-percent command tells EIGRP what percentage of the configured bandwidth it mayuse. The default is 50 percent.

Reference:http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094063.shtml

QUESTION 17Which two statements are true about LACP? (Choose two)

A. LACP packets are sent with multicast group MAC address 01-80-c2-00-00-02.B. The Type/Field value is 0x8808.C. The timeout for a failed LACP channel is 30 seconds by defaultD. During detection, LACP packets are transmitted every second.

Correct Answer: ADSection: Explanation


QUESTION 18Which RFC number contains the specification for Protocol Independent Multicast sparse mode?

A. 1918B. 2044C. 1011D. 4061



QUESTION 19What are two ways to force the selection of a root bridge in a network that is running the 802.1D protocol?(Choose two.)

A. spanning-tree vlan vlan-id root

B. spanning-tree vlan vlan-id priority 65535C. spanning tree vlan all rootD. spanning-tree vlan vlan-id force rootE. spanning-tree vlan vlan-id priority 0

Correct Answer: AESection: Explanation


QUESTION 20In an 802.1s BPDU, what is the size of the configuration revision number?

A. 16 BitsB. 24 BitsC. 32 BitsD. 8 Bits



QUESTION 21What is the BPDU protocol version for 802.1w?

A. 3B. 2C. 0D. 1


Explanation/Reference:http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml

QUESTION 22Which two statements are true about PAgP? (Choose two.)

A. The PAgP protocol value is 0x0104.B. PAgP uses the same multicast group MAC address as Cisco Discovery Protocol.C. PaGP packets are sent with multicast group MAC address 01-80-c2-00-00-02.D. During detection, PAgP packets are transmitted every 2 seconds.

Correct Answer: ABSection: Explanation


QUESTION 23Which individual metrics can be used to calculate the composite EIGRP metric?

A. total delay, minimum bandwidth, reliability, loadB. total delay, minimum bandwidthC. total delay, minimum bandwidth, reliability, load, hop countD. total delay, minimum bandwidth, reliability, load, MTU, hop countE. total delay, minimum bandwidth, reliability, load, MTU




Considering the following policer, which statement is valid?

A. The policer allows traffic to peak to 16 kb/s for the duration of a Tc interval if no traffic passed over theprevious interval

B. The Tc interval equals 125 msC. Traffic exceeding 8 kb/s is never droppedD. The policer allows an excess burst of 1 kbE. Traffic exceeding 8 kb/s is systematically dropped



QUESTION 25Which two multicast addresses are reserved for use by ALL-PIM-ROUTERS? (Choose two.)

A. ff02::13B. ff02::39C. 224.0.0.13D. 224.0.0.39E. ff02::dF. 224.0.0.17

Correct Answer: CESection: Explanation


http://en.wikipedia.org/wiki/Multicast_address

QUESTION 26What is the Internet Protocol Number for all PIM control Messages?

A. 15B. 25C. 103D. 17

Correct Answer: CSection: Explanation


QUESTION 27Which two statements are true about traffic shaping? (Choose two.)

A. It supports interaction with frame relay congestion indication.B. Shaping can remark excess packets.C. Shaping buffers excess packets.D. It is applied in the incoming direction only.

Correct Answer: ACSection: Explanation



Which statement is correct?

A. The OSPF cost to both border routers is 128.B. Both routers are border routers for areas 128 and 0.C. The priority of both OSPF border routers is 128.D. The age of both border routers is 128.

Correct Answer: A

Section: Explanation


QUESTION 29Which address needs to be present on an interface for OSPFv3 to form an adjacency?

A. Unique localB. Link localC. FF02::5D. FF02::6E. Global unicast



QUESTION 30From which IPv6 address are EIGRPv6 hello messages sourced?

A. Global unicastB. Link localC. Site localD. Unique localE. FF02::A



QUESTION 31Which value should be used in a router configuration register in order to ignore the content of the NVRAM?

A. 0x2142B. 0x2102C. 0x2124D. 0x2101



QUESTION 32If shaping is configured with 128 KB/s and a committed burst of 3200 B/s, what would be the value of TC?

A. 125 msB. 25 msC. 25 secD. 125 sec



QUESTION 33What does the beginning of a multicast address look like, if it is used for embedded RP?

A. FFB. FF3C. Embedded RP does not use any special IPv6 address.D. FF7



QUESTION 34Which QoS mechanism wiII allow traffic flows an equal share of the bandwidth?

A. WREDB. PolicerC. LLQD. Rate-LimitE. Fair-QueueF. Shaper

Correct Answer: ESection: Explanation


QUESTION 35Which two statements are true about the lnside Global address in NAT? (Choose two.)

A. the IP address of an inside host as it appears to the outside networkB. if the enterprise is connected to the global Internet, this address can be allocated from a globally unique

address spaceC. the IP address of an outside host as it appears to the inside network

D. if the enterprise is connected to the global Internet, this address can be allocated from the space defined byRFC 1918

Correct Answer: ABSection: Explanation



If the router that produced the output in the exhibit faiIs, which virtual IP address wiII become active when therouter recovers?

A. 10.1.1.2B. 10.1.1.101C. All groupsD. 10.1.1.1



QUESTION 37How many bytes make up the spanning-tree bridge ID?

A. 4B. 8C. 16D. 12



QUESTION 38Which IPv6 multicast address is reserved for use by all PIM routers?

A. ff02::13

B. ff021::39C. ff02::dD. ff02::17

Correct Answer: CSection: Explanation


QUESTION 39How can excess packets be remarked?

A. all of the aboveB. shapingC. priorityD. policing




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Actual Tests 350-001 15-11-2012 by Spike 39Q · PDF file ... Which QoS mechanism wiII...

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