400-101 Exam - CCIE Routing and Switching (v5.0)

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Q1. What are two benefits of NVI? (Choose two.) 

A. It provides scalability by maintaining a NAT table on every interface. 

B. It can dynamically create a static route to the NAT pool for translation. 

C. It supports the use of route maps for policy-based NAT. 

D. It supports the use of a single interface for translations. 

E. It injects a route into the existing routing protocol that directs translation to the NAT pool. 

Answer: A,B 

Q2. Refer to the exhibit. 

How many LSDBs will router A have? 

A. 0 

B. 1 

C. 2 

D. 3 

Answer:

Q3. Which two statements about ERSPAN are true? (Choose two.) 

A. It supports jumbo frames of up to 9202 bytes. 

B. It adds a 50-byte header to copied Layer 2 Ethernet frames. 

C. It supports packet fragmentation and reassembles the packets. 

D. It adds a 4-byte header to copied Layer 2 Ethernet frames. 

E. Source sessions on an individual switch can use different origin IP addresses. 

Answer: A,B 

Q4. Which three types of address-family configurations are supported in EIGRP named mode? (Choose three.) 

A. address-family ipv4 unicast 

B. address-family vpnv4 

C. address-family ipv6 unicast 

D. address-family ipv6 multicast 

E. address-family vpnv6 

F. address-family ipv4 multicast 

Answer: A,C,F 

Q5. Which CoS value is mapped to DSCP 48 by default? 

A. 6 

B. 7 

C. AF21 

D. AF44 

E. AF41 

F. 46 

Answer:

Q6. What are the three modes of Unicast Reverse Path Forwarding? 

A. strict mode, loose mode, and VRF mode 

B. strict mode, loose mode, and broadcast mode 

C. strict mode, broadcast mode, and VRF mode 

D. broadcast mode, loose mode, and VRF mode 

Answer:

Q7. Which two statements about LDP advertising when Explicit Null is in effect are true? (Choose two.) 

A. Penultimate hop popping is disabled. 

B. Penultimate hop popping is enabled. 

C. It is the default behavior for LDP. 

D. It is used for the advertisement of static routes. 

E. It is used for the advertisement of connected routes. 

Answer: A,E 

Q8. Like OSPFv2, OSPFv3 supports virtual links. Which two statements are true about the IPv6 address of a virtual neighbor? (Choose two.) 

A. It is the link-local address, and it is discovered by examining the hello packets received from the virtual neighbor. 

B. It is the link-local address, and it is discovered by examining link LSA received by the virtual neighbor. 

C. It is the global scope address, and it is discovered by examining the router LSAs received by the virtual neighbor. 

D. Only prefixes with the LA-bit not set can be used as a virtual neighbor address. 

E. It is the global scope address, and it is discovered by examining the intra-area-prefix-LSAs received by the virtual neighbor. 

F. Only prefixes with the LA-bit set can be used as a virtual neighbor address. 

Answer: E,F 

Explanation: 

OSPF for IPv6 assumes that each router has been assigned link-local unicast addresses on each of the router's attached physical links. On all OSPF interfaces except virtual links, OSPF packets are sent using the interface's associated link-local unicast address as the source address. A router learns the link-local addresses of all other routers attached to its links and uses these addresses as next-hop information during packet forwarding. On virtual links, a global scope IPv6 address MUST be used as the source address for OSPF protocol packets. The collection of intra-area-prefix-LSAs originated by the virtual neighbor is examined, with the virtual neighbor's IP address being set to the first prefix encountered with the LA-bit set. 

Reference: https://tools.ietf.org/html/rfc5340 

Q9. Which option is the default number of routes over which EIGRP can load balance? 

A. 1 

B. 4 

C. 8 

D. 16 

Answer:

Explanation: 

By default, EIGRP load-shares over four equal-cost paths. For load sharing to happen, the routes to load-share over must show up in the IP forwarding table or with the show ip route command. Only when a route shows up in the forwarding table with multiple paths to it will load sharing occur. 

Reference: http://www.informit.com/library/content.aspx?b=CCIE_Practical_Studies_I&seqNum=126 

Q10. Which feature of Cisco IOS XE Software allows for platform-independent code abstraction? 

A. its security 

B. Common Management Enabling Technology 

C. the Linux-based environment 

D. its modularity 

Answer: