A Review Of Real 640-875 exam

Q1. 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 

View Answer

Q2. Which two statements about Cisco IOS XE operations are true? (Choose two.) 

A. Cisco IOS XE uses a two-stage configuration method. 

B. Using the commit global configuration command, all the committed changes will be persistent across reboots. 

C. The copy run start command makes the configuration changes persistent across reboots. 

D. The erase start command followed by the reboot command brings up the router without any configurations. 

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

View Answer

Q3. 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. 

View Answer

Q4. Which statement about a root bridge in an STP domain is true? 

A. It has the highest root ID in the STP domain. 

B. It has the lowest bridge ID in the STP domain. 

C. It contains non-designated ports. 

D. It contains root ports. 

E. It has the highest priority value. 

View Answer

Q5. Which Cisco IOS XR command displays traffic counters for an individual interface that is configured on the router? 

A. RP/0/RSP0/CPU0:PE1(config)# show bundle 

B. RP/0/RSP0/CPU0:PE1# show interfaces GigabitEthernet 0/0/0/1 

C. RP/0/RSP0/CPU0:PE1# show controllers GigabitEthernet 0/0/0/1 

D. RP/0/RSP0/CPU0:PE1(admin)# show platform 

E. RP/0/RSP0/CPU0:PE1(admin)# show hw-module fpd location all 

F. RP/0/RSP0/CPU0:PE1# show interfaces brief 

View Answer

Q6. You are having problems browsing to http://www.cisco.com from your laptop that is running Windows. Your laptop is connected directly to a default gateway, which is a Cisco ISR G2 router. Which four options are the basic troubleshooting steps that you should use to troubleshoot this issue? (Choose four.) 

A. Issue the ipconfig command from the Windows command line on your laptop to determine your laptop IP address and the default gateway IP address. 

B. Issue the ipconfig /all command from the Windows command line on your laptop to determine the DNS server IP address. 

C. Issue the ping {default gateway IP address} command from the Windows command line on your laptop to verify connectivity to the default gateway. 

D. Issue the ping {DNS server IP address} command from the Windows command line on your laptop to verify connectivity to the DNS server. 

E. Issue the ping tcp www.cisco.com 80 command from the Windows command line on your laptop to verify TCP port 80 connectivity to the www.cisco.com server. 

F. From the ISR G2 CLI, issue the ping tcp www.cisco.com 80 command to verify TCP port 80 connectivity to the www.cisco.com server. 

G. From the ISR G2 CLI, issue the ISR-G2#tracert www.cisco.com command to verify connectivity to the www.cisco.com server. 

H. From the ISR G2 CLI, issue the ISR-G2#nslookup www.cisco.com command to determine the IP address of the www.cisco.com server. 

View Answer

Q7. Which Cisco IOS CLI command is used to verify the speed and duplex settings on the Fa0/1 port on a Cisco switch? 

A. show ip interfaces fa0/1 

B. show interfaces fa0/1 

C. show interfaces fa0/1 switchport 

D. show ip interfaces brief 

E. show interfaces switchport 

View Answer

Q8. 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 

View Answer

Q9. Given these four Class B networks: 172.104.0.0, 172.105.0.0, 172.106.0.0, 172.107.0.0, what is the supernet (CIDR) address that summarizes these four Class B networks? 

A. 172.104.0.0/12 

B. 172.104.0.0/13 

C. 172.104.0.0/14 

D. 172.104.0.0/15 

View Answer

Q10. Refer to the exhibit. 

According to this show output, what are sticky MAC addresses? 

A. dynamically learned MAC addresses on the port that are stored in the MAC address table and also in the start-up configuration 

B. statically configured MAC addresses on the port that are stored in the MAC address table 

C. statically configured MAC addresses on the port that are stored in the start-up configuration 

D. dynamically learned MAC addresses on the port that are stored in the running 

configuration 

View Answer