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2017 Mar 400-101 book
Q71. Refer to the exhibit.
What is the PHB class on this flow?
This command shows the TOS value in hex, which is 80 in this case. The following chart shows some common DSCP/PHB Class values:
DSCP - TOS Binary
101110 - 101110xx
001000 - 001000xx
100000 - 100000xx
110000 - 110000xx
Network control 2
111000 - 111000xx
Q72. Which IPv6 prefix is used for 6to4 tunnel addresses?
6to4 works by taking advantage of a reserved IPv6 prefix, 2002::/16. A 6to4 tunnel interface automatically converts the 32 bits in its IPv6 address following this prefix to a global unicast IPv4 address for transport across an IPv4 network such as the public Internet.
Q73. DRAG DROP
Drag and drop the Cisco IOX XE subpackage on the left to the function it performs on the right.
Q74. Which statement about passive interfaces is true?
A. The interface with the OSPF passive interface configuration appears as a not-so-stubby network.
B. The interface with the EIGRP passive interface configuration ignores routes after the exchange of hello packets.
C. The interface with the IS-IS passive interface configuration sends the IP address of that interface in the link-state protocol data units.
D. Passive interface can be configured on the interface for IS-IS.
With IS-IS, passive interfaces are used to prevent unnecessary LSA packets out that interface, but the IP address of passive interfaces are still included in updates going out the other interfaces. This behavior is what enables the best practice of configuring loopback interfaces as passive, but still having the loopback be reachable.
Q75. Which two statements about class maps are true? (Choose two.)
A. As many as eight DSCP values can be included in a match dscp statement.
B. The default parameter on a class map with more than one match command is match-any.
C. The match class command can nest a class map within another class map.
D. A policy map can be used to designate a protocol within a class map.
Router(config-cmap)# match [ip] dscp dscp-value [dscp-value dscp-value dscp-value
dscp-value dscp-value dscp-value dscp-value]
(Optional) Identifies a specific IP differentiated service code point (DSCP) value as a match criterion. Up to eight DSCP values can be included in one match statement.
Router config-cmap)# match class-map class-name (Optional) Specifies the name of a traffic class to be used as a matching criterion (for nesting traffic class [nested class maps] within one another).
Regenerate 400-101 real exam:
Q76. DRAG DROP
Drag and drop the DMVPN command on the left to the corresponding function on the right.
Q77. What is the function of NSF?
A. forward traffic simultaneously using both supervisors
B. forward traffic based on Cisco Express Forwarding
C. provide automatic failover to back up supervisor in VSS mode
D. provide nonstop forwarding in the event of failure of one of the member supervisors
Q78. Refer to the exhibit.
All of the routers on this network are running RIP. If you edit the R3 RIP process configuration to reduce the number of hops from R3 to R1, which statement about the configuration change is true?
A. Configuring no passive-interface for GigabitEthernet0/0 in the R3 RIP process reduces the number of hops to R1 by 2.
B. Configuring no passive-interface for GigabitEthernet0/0 in the R3 RIP process reduces the number of hops to R1 by 1.
C. Configuring no passive-interface for GigabitEthernet0/1 in the R3 RIP process reduces the number of hops to R1 by 3.
D. Configuring no passive-interface for GigabitEthernet0/1 in the R3 RIP process reduces the number of hops to R1 by 1.
By changing the link from R3 to R2 to not be passive, traffic can then take the direct route from R3-R2-R1 instead of the longer path of R3-R6-R5-R4-R1, resulting in two less hops.
Q79. Which two options are the two underlying protocols on which a DMVPN relies? (Choose two.)
Q80. Which two BGP attributes are optional, non-transitive attributes? (Choose two.)
A. AS path
B. local preference
E. cluster list