最新的CCIE認證 350-029考試題庫

問題1

Refer to the exhibit.

An MPLS L2VPN service is provisioned for VPN-A and VPN-B. Which two statements describe the label exchange and the LDP session requirement for MPLS L2VPN signaling? (Choose two.)

A. LDP must be enabled on the address that is used as the LDP ID between PE1 and PE2.

B. BGP is required for LDP, based on the Layer 2 VPN.

C. PE2 uses the label value that is received from PE1 for VPN-B as the transport label for VPN-

D. PE1 uses the label value that is received from PE2 for VPN-B as the transport label for VPN-B.

E. T-LDP sessions are established between PE1, P1, P2, and PE2.

F. PE1 uses the label value that is received from PE2 for VPN-B as the inner label for VPN-B.

正確答案: A,F

問題2

Which three of these options can be a forwarding equivalence class? (Choose three.)

A. a bgp prefix

B. bridge or switch instance

C. routing equivalence paths

D. groups of IP addresses

E. IPsec tunnel

F. traffic engineering tunnel

正確答案: B,D,F

問題3

One benefit of MPLS Layer 3 VPN is that migration for the end customer is simplified.
Which statement is true?

A. There is no requirement to support MPLS on the PE router and no modifications are required for a customer intranet.

B. There is no requirement to support MPLS on the PE router and modifications are required for a customer intranet.

C. There is no requirement to support MPLS on the CE router and no modifications are required for a customer intranet.

D. There is requirement to support MPLS on the CE router and no modifications are required for a customer intranet.

正確答案: C

問題4

Refer to the exhibit.

Routers R1 and R2 have exchanged label binding information. What is preventing the labels from populating the MPLS forwarding table?

A. Inbound access list 100 is applied on the serial interface.

B. The MPLS label distribution protocol is mismatched.

C. Cisco Express Forwarding is not running.

D. MTU on the serial interface cannot accommodate labels.

正確答案: C

問題5

A network engineer wants to deploy a VPLS service within the MPLS backbone. The backbone expert team advises that LDP for signaling is used.
Which two characteristics of LDP would influence their decision? (Choose two.)

A. BGP does not need to be run on the PE device.

B. CDP is not required on the PE routers.

C. LDP signaling requires a loopback-based router I

D. Non-convergence with IP VPN operation.

E. There is no autodiscovery.

正確答案: A,E

問題6

A security agency wants to use the services of the service provider to interconnect the remote sites. However, they do not want to share the IP addresses of their sites and they want end-to-end security.
Which three services meet the design requirements? (Choose three.)

A. L3VPN

B. L2VPN

C. tunnel mode VPN

D. PPTP

E. client mode VPN

F. SSL VPN

正確答案: B,C,E

問題7

In AToM, control word is an optional 4-byte field used in the pseudowire packet. The control word carries generic and Layer 2 payload-specific information to emulate L2 packets correctly. In pseudowire packet, where is this control word inserted?

A. Inserted between the MPLS label stack and the Layer 2 payload

B. Inserted between the MPLS label stack and the Layer 2 header

C. Inserted between the MPLS label stack and the Layer 3 payload

D. Inserted between the MPLS label stack and the Layer 3 Header

正確答案: B

問題8

Which two statements about 10 Gigabit Ethernet (10GE) are true? (Choose two.)

A. 10 Gigabit Ethernet supports Carrier Sense Multiple Access with Collision Detection (CSMA/CD).

B. 10 Gigabit Ethernet supports full duplex links, but does not support half duplex links.

C. 10 Gigabit Ethernet supports optical fiber connections in single mode only. Multi mode is not supported.

D. 10 Gigabit Ethernet does not support VLAN definition

E. 10 Gigabit Ethernet supports unshielded or shielded twisted-pair cable connections

正確答案: B,E

問題9

Refer to the exhibit.

Inbound Infrastructure ACLs are configured to protect the SP network. Which three types of traffic should be filtered in the infrastructure ACLs? (Choose three.)

A. FTP traffic destined for internal routers

B. traffic from a source with an IP address that is within 239.255.0.0/16

C. traffic from a source with an IP address that is within 162.238.0.0/16

D. IPsec traffic that at an internal router

E. EBGP traffic that peers with edge routers

正確答案: A,B,C

說明：（僅 VCESoft 成員可見）

問題10

How many token buckets are needed to support a multi-actions policer that meters conforming, exceeding and violating traffic?

A. 1

B. 6

C. 4

D. 5

E. 3

F. 2

正確答案: F

問題11

Refer to the exhibit.

Which Cisco IOS feature does this algorithm illustrate?

A. EIGRP DUAL

B. the Cisco MPLS traffic engineering path recalculation

C. OSPF exponential back-off

D. IP event dampening

E. partial SPF

正確答案: D

說明：（僅 VCESoft 成員可見）

問題12

Which statement about OSPF authentication is true?

A. OSPFv3 uses router ID as a key to encrypt OSPF hello packets.

B. OSPF MD5 authentication uses TCP, and Plan Test authentication uses UDP.

C. To enable OSPF authentication in a network, OSPF area 0 authentication must be enabled first.

D. The payload of OSPFv3 packets contains no authentication information.

E. OSPFv3 supports Advanced Encryption Standard

正確答案: D

問題13

BCP (Best Common Practices) 38/RFC 2827 Ingress and Egress Packet Filtering would help mitigate what classification of attack?

A. Sniffing attack

B. Port Scan attack

C. Reconnaisance attack

D. Denial of service attack

E. Spoofing attack

正確答案: E

說明：（僅 VCESoft 成員可見）

問題14

In an OSPF domain, four routers are running the OSPF protocol over a LAN switch in a broadcast domain. What is the expected output of executing the show ip OSPF neighbor command on the router that is neither a DR nor a BDR?

A. three 2WAY states

B. one FULL state, two 2WAY states

C. three FULL states

D. two FULL states, one 2WAY state

正確答案: D

問題15

Which three options are tasks of the BGP scanner process? (Choose three.)

A. processing any route "churn"

B. updating IP RIB

C. providing BGP Dampening information updates

D. processing of BGP packets

E. performing Conditional Advertisement checks

F. checking next-hop reachability

G. performing BGP synchronization

正確答案: C,E,F

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