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. This show output is from the S7 Cisco Metro Switch and the PE7 Cisco ASR 9000 Series Router. Which configuration change(s) is/are needed to bring the S7 FastEthernet 0/2 interface into the up/up state? 

*Mar 20 21:28:02.177: %ETHCNTR-3-HALF_DUX_COLLISION_EXCEED_THRESHOLE. Collisions at FastEthernet0/2 exceed threshold. Considered as loop-back. 

*Mar 20 21:28:02.177: %PM-4-ERR_DISABLF. loopback error detected on Fa0/2, putting Fa0/2 in err-disable state 

*Mar 20 21:28:03.184: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down 

S7#show interface fa0/2 

FastEthernet0/2 is down, line protocol is down (err-disabled)

 Hardware is Fast Ethernet, address is e8ba.70b5.6c04 (bia e8ba.70b5.6c04)

 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

 reliability 255/255, txload 1/255, rxload 1/255

 Encapsulation ARPA, loopback not set

 Keepalive set (10 sec)

 Half-duplex, 10Mb/s, media type is 10/100BaseTX

 input flow-control is off, output flow-control is unsupported

 ARP typF. ARPA, ARP Timeout 04:00:00

 Last input 00:00:40, output 00:00:00, output hang never

 Last clearing of "show interface" counters never

 Input queuF. 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

 Queueing strategy: fifo

 Output queuF. 0/40 (size/max)

 5 minute input rate 0 bits/sec, 0 packets/sec

 5 minute output rate 0 bits/sec, 0 packets/sec

 484423 packets input, 39349929 bytes, 0 no buffer

 Received 484423 broadcasts (167203 multicasts) 0 runts, 0 giants, 0 throttles

 1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

 0 watchdog, 167203 multicast, 0 pause input

 0 input packets with dribble condition detected

 972398 packets output, 128931949 bytes, 0 underruns

 0 output errors, 46 collisions, 4 interface resets

 0 babbles, 0 late collision, 0 deferred

 0 lost carrier, 0 no carrier, 0 PAUSE output

 0 output buffer failures, 0 output buffers swapped out 

RP/0/RSP0/CPU0:PE7#show interfaces gi0/0/0/0 

GigabitEthernet0/0/0/0 is down, line protocol is down

 Interface state transitions: 4

 Hardware is GigabitEthernet, address is 4055.392f.40a8 (bia 4055.392f.40a8)

 Internet address is 192.168.107.70/24

 MTU 1514 bytes, BW 100000 Kbit (Max: 100000 Kbit)

 reliability 255/255, txload 0/255, rxload 0/255

 Encapsulation ARPA,

 Full-duplex, 100Mb/s, THD, link type is force-up

 output flow control is off, input flow control is off

 loopback not set,

 ARP type ARPA, ARP timeout 04:00:00

 Last input 00:00:00, output 00:00:35

 Last clearing of "show interface" counters never

 5 minute input rate 0 bits/sec, 0 packets/sec

 5 minute output rate 0 bits/sec, 0 packets/sec 972551 packets input, 128953765 bytes, 729 total input drops 172486 drops for unrecognized upper-level protocol Received 0 broadcast packets, 800781 multicast packets 0 runts, 0 giants, 0 throttles, 0 parity 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 484545 packets output, 39360900 bytes, 0 total output drops Output 317283 broadcast packets, 167262 multicast packets 0 output errors, 0 underruns, 0 applique, 0 resets 0 output buffer failures, 0 output buffers swapped out 4 carrier transitions 

A. Enable loopback line on the S7 Fa0/2 interface then shut and no shut the Fa0/2 interface. 

B. Enable duplex half on the PE7 Gi0/0/0/0 interface then shut and no shut the Fa0/2 interface on S7. 

C. Change S7 Fa0/2 interface to duplex full and speed 100 then shut and no shut the Fa0/2 interface. 

D. Just need to no shut the Fa0/2 interface on S7. 

E. Just need to shut and no shut the Fa0/2 interface on S7. 

Answer:

Explanation: 

Q2. 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 

Answer: B,D,E,G 

Explanation: 

Q3. Refer to the exhibit. 

Which layer(s) of the TCP/IP model operates end-to-end (Host A to Host B)? 

A. physical layer 

B. link layer 

C. transport and application layers 

D. link and internet (network) layers 

E. physical and link layers 

Answer:

Explanation: 

Q4. If a bridge port is in the non-designated state, which two statements about spanning-tree operations on this port are true? (Choose two.) 

A. This port is in the Forwarding state. 

B. This port sends BPDUs on the attached link. 

C. This port has the lowest cost to the root bridge. 

D. This port is considered the root port. 

E. This port receives BPDUs. 

F. This port is in the Blocked state. 

Answer: E,F 

Explanation: 

Q5. Refer to the exhibit. 

R1 and R2 are running RIPv1 for the 10.0.0.0 and 192.168.1.0 networks. No default or static routes have been configured on the routers. Which two statements about this topology are true? (Choose two.) 

A. R1 summarizes the 10.1.1.0/24 subnet to 10.0.0.0/8 when it sends its RIPv1 routing updates to R2. R2 summarizes the 10.2.2.0/24 subnet to 10.0.0.0/8 when it sends its RIPv1 routing updates to R1. 

B. To support this topology, R1 and R2 must be configured so that RIPv1 auto-summary is disabled. 

C. R1 sends information about the 10.1.1.0/24 subnet when it sends its RIPv1 routing updates to R2. R2 sends information about the 10.2.2.0/24 subnet when it sends its RIPv1 routing updates to R1. Example of RIPv1 update from R1 to R2: 

D. RIP: build update entries network 10.1.1.0/24 metric 1 Hosts on the 10.1.1.0/24 subnet are unable to communicate with hosts on the 10.2.2.0/24 subnet. 

E. R1 accepts the 10.2.2.0/24 RIPv1 routing updates from R2 and installs the 10.2.2.0/24 route in its routing table. R2 accepts the 10.1.1.0/24 RIPv1 routing updates from R1 and installs the 10.1.1.0/24 route in its routing table. 

Answer: A,D 

Explanation: 

Q6. With IPv6, for which purpose are router solicitation and router advertisement used? 

A. routing protocol updates 

B. routing protocol neighbor peerings 

C. router and prefix discovery 

D. Layer 3 to Layer 2 address resolution (similar to IPv4 ARP) 

Answer:

Explanation: 

Q7. Which Layer 2 WAN protocol uses DLCI as the virtual circuit identifier? 

A. ATM 

B. PPP 

C. Frame Relay 

D. Packet over SONET 

E. Metro Ethernet 

Answer:

Explanation: 

Q8. 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: 

Q9. 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:

Explanation: 

Q10. Which Cisco router feature allows multiple independent routing table instances to co-exist within the same router at the same time? 

A. Virtual Contexts 

B. Virtual Machines 

C. VTI 

D. VRF 

E. VPLS 

F. GRE 

Answer:

Explanation: