The Down to date Guide To 640-875 practice test

Q1. Which pair of mechanisms are often used together to allow dynamic routing over a secured site-to-site VPN tunnel? 

A. GRE + SSL 

B. VTI + SSL 

C. VRF + SSL 

D. GRE + IPsec 

E. L2TP + IPsec 

F. VRF + IPsec 

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Q2. Which three statements about Cisco IOS XR CLI operations are true? (Choose three.) 

A. Cisco IOS XR uses a three-stage configuration method. 

B. Committed changes are persistent across reboots in Cisco IOS XR. 

C. The commit replace global configuration command replaces the contents of the running configuration with the target configuration. 

D. The save global configuration command saves the contents of target configuration to the running configuration. 

E. There is no concept of a startup-config in Cisco IOS XR. 

F. The clear global configuration command erases the entire current running configuration. 

G. The show running-config global configuration command displays the configuration that occurs if the contents of the uncommitted changed (target configuration) are committed to the running configuration. 

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Q3. Currently, a Cisco IOS XR router is configured to send IP SLA probes to a network management station that is acting as the IP SLA target device. How can IP SLA measurement accuracy be improved and also provide additional statistics? 

A. Use ICMP echo probes instead of UDP echo probes. 

B. Configure another Cisco router as the target and enable that other Cisco router for IP SLA Responder operations. 

C. Increase the rate (frequency) at which a specified IP SLA operation is sent into the network. 

D. Use UDP echo probes instead of ICMP echo probes and enable UDP echo service on the target network management station. 

E. Enable IP SLA Responder service on the target network management station 

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Q4. What does a transparent LAN switch use to build its CAM table? 

A. BPDU messages exchanged with neighbor bridges 

B. STP messages exchanged with neighbor bridges 

C. dynamic routing protocol updates from neighbor bridges 

D. analysis of the source MAC address of incoming frames on the bridge ports 

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Q5. Which three IP addresses are valid for hosts that belong to the 10.152.0.0/13 subnet? 

(Choose three.) 

A. 10.152.0.0/13 

B. 10.153.0.1/13 

C. 10.158.255.255/13 

D. 10.159.255.254/13 

E. 10.160.0.1/13 

F. 10.161.0.1/13 

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Q6. Refer to the exhibit. 

Robert is sending an instant message to Mary. The message will be broken into a series of packets that will traverse all network devices. Which four options are the MAC and IP source and destination addresses that will populate these packets as they are forwarded from Router2 to Router1? (Choose four.) 

A. source MAC = 0000.00a1.2222 

B. source MAC = 0000.000c.0123 

C. destination MAC = 0000.00a1.3333 

D. destination MAC = 0000.000c.0124 

E. source IP 10.1.2.2 

F. source IP 10.1.1.253 

G. destination IP = 10.1.3.3 

H. destination IP = 10.1.1.254 

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Q7. Using VLSM, how many /30 subnets can be derived from a single /27 Class C subnet? 

A. 1 

B. 2 

C. 4 

D. 8 

E. 12 F. 16 

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Q8. Which statement about IPv6 global unicast addresses is true? 

A. The first 3 bits is 001. 

B. The first 4 bits is 0011. 

C. The first 4 bits is 1111. 

D. The first 16 bits is FE80 in hex. 

E. The first 16 bits is FF00 in hex. 

F. The first 16 bits is 2002 in hex. 

G. The first 16 bits is 3FFE in hex. 

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Q9. Refer to the exhibit. 

You want to enable these three actions: 

.

 Enable the fa0/1 router's interface to obtain its interface IP address dynamically from a DHCP server. 

.

 Enable the router to configure the next hop ip address of the default route automatically based on the DHCP response. 

.

 Enable the router to act as the DHCP server for other clients connected to the router fa0/2 interface. 

Which three Cisco IOS configurations must you use? (Choose three.) 

A. ip route 0.0.0.0 0.0.0.0 fa0/1 

B. ip route 0.0.0.0 0.0.0.0 dhcp 

C. ip dhcp excluded-address 192.168.101.1 

D. ! ip dhcp pool test1 network 192.168.101.0 255.255.255.0 default-router 192.168.101.1 dns-server 200.165.200.101 ip dhcp pool test2 

E. ip local pool test2 192.168.101.2 192.168.101.254 default-router 192.168.101.1 dns-server 200.1665.200.101 int fa0/1 

F. ip address auto int fa0/1 

G. ip address dhcp int fa0/1 

H. ip helper-address dhcp 

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Q10. Which type of IPv6 address does the ff00::/8 prefix denote? 

A. local loopback 

B. global unicast 

C. unique link local 

D. link local unicast 

E. multicast 

F. anycast 

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