Exam Code: 640-875 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Building Cisco Service Provider Next-Generation Networks, Part 1
Certification Provider: Cisco
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Q1. On Cisco IOS XR, for which purpose is the turboboot procedure used?
A. to boot the router into ROM Monitor mode
B. to install the IOS XR software from scratch using the ROM Monitor mode
C. to install and boot up a PIE
D. to install and boot up a SMU
E. to perform an ISSU
F. to speed up the time it takes to boot up the IOS XR router
Answer: B
Explanation:
Q2. Which statement about STP operations is true?
A. One root bridge exists per collision domain.
B. One root port is established per root bridge.
C. One designated port is defined per segment.
D. Non-designated ports are set in the forwarding state.
E. One root port exists per broadcast domain.
Answer: C
Explanation:
Q3. 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.
Answer: B
Explanation:
Q4. Which two statements about IPv4 DHCP operations are true? (Choose two.)
A. If the DHCP clients and servers are on the same subnet, DHCP uses UDP broadcasts to communicate between the clients and servers.
B. The DHCP server that receives a DHCPDISCOVER message may respond with a DHCPOFFER message on UDP port 67.
C. A client can receive DHCPOFFER from multiple servers and it can accept all the offers by broadcasting the DHCPREQUEST message to all the servers.
D. A DHCP relay is required if the DHCP clients and the servers are on the same subnet.
E. If the client and server are on different subnets, DHCPDISCOVER and DHCPREQUEST messages are sent via UDP broadcasts, but DHCPOFFER and DHCPACK messages are unicast.
F. The client broadcasts a DHCPDISCOVER message on UDP port 68 with its own MAC address to discover available DHCP servers.
Answer: A,E
Explanation:
Q5. 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
Answer: B
Explanation:
Q6. Which three statements about Cisco Discovery Protocol operations on a Cisco ME3400 switch are true? (Choose three.)
A. Cisco Discovery Protocol is enabled by default on NNI ports.
B. Cisco Discovery Protocol is enabled by default on all NNI, ENI, and UNI ports.
C. Cisco Discovery Protocol is disabled by default on ENI ports.
D. Cisco Discovery Protocol is not supported on NNI or ENI ports.
E. Cisco Discovery Protocol is not supported on UNI ports.
Answer: A,C,E Explanation:
Q7. Refer to the exhibit.
Which configuration is necessary to support this output?
A. interface Ethernet0
B. ip address 192.168.3.1 255.255.255.0 ip nat outside ! interface Ethernet1 ip address 192.168.4.1 255.255.255.0 ip nat outside ! interface Serial0 ip address 172.17.38.1 255.255.255.0 ip nat inside ! ip nat inside source list 1 interface Serial0 overload ! access-list 1 permit 192.168.3.0 0.0.0.255 access-list 1 permit 192.168.4.0 0.0.0.255
interface Ethernet0
C. ip address 192.168.3.1 255.255.255.0 ip nat inside ! interface Ethernet1 ip address 192.168.4.1 255.255.255.0 ip nat inside ! interface Serial0 ip address 172.17.38.1 255.255.255.0 ip nat outside ! ip nat inside source list 1 interface Serial0 overload ! access-list 1 permit 172.17.38.0 0.0.0.255
interface Ethernet0
D. ip address 192.168.3.1 255.255.255.0 ip nat inside ! interface Ethernet1 ip address 192.168.4.1 255.255.255.0 ip nat inside ! interface Serial0 ip address 172.17.38.1 255.255.255.0 ip nat outside ! ip nat inside source list 1 static 172.17.38.1 ! access-list 1 permit 192.168.3.0 0.0.0.255 access-list 1 permit 192.168.4.0 0.0.0.255 interface Ethernet0
E. ip address 192.168.3.1 255.255.255.0 ip nat inside ! interface Ethernet1 ip address 192.168.4.1 255.255.255.0 ip nat inside ! interface Serial0 ip address 172.17.38.1 255.255.255.0 ip nat outside ! ip nat inside source list 1 interface Serial0 overload ! access-list 1 permit 192.168.3.0 0.0.0.255 access-list 1 permit 192.168.4.0 0.0.0.255
Answer: D
Explanation:
Q8. What are the three RFC 1918 IPv4 private address ranges? (Choose three.)
A. 10.0.0.0 - 10.255.255.255
B. 172.16.0.0 - 172.255.255.255
C. 172.16.0.0 - 172.31.255.255
D. 192.168.0.0 - 192.168.31.255
E. 192.168.0.0 - 192.168.255.255
Answer: A,C,E
Explanation:
Q9. Which Cisco IOS XR command is involved in enabling remote access?
A. RP/0/RSP0/CPU0:PE1(config)# router static
B. RP/0/RSP0/CPU0:PE1(config)# line console 0
C. RP/0/RSP0/CPU0:PE1(config)# vrf default
D. RP/0/RSP0/CPU0:PE1(config)# telnet ipv4 server max-servers 20
E. RP/0/RSP0/CPU0:PE1(config)# username CISCO password LAB
Answer: D
Explanation:
Q10. Which feature is used to protect the control plane of the router?
A. port security
B. uRPF
C. routing protocol authentication
D. VRF
E. SSH
F. SSL
Answer: C
Explanation: