The Renovate Guide To 640-875 exam question

Q1. 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. 

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Q2. 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 

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Q3. 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 

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Q4. Which two statements are correct regarding routing protocol authentication? (Choose two.) 

A. MD5 authentication can only be established between Internal BGP peers. 

B. Authentication can be established using keychains on one peer and MD5 hashing on the other. 

C. UDP port 179 is used for BGP session authentication. 

D. MD5 passwords are never sent to a peer. 

E. Routers authenticate each routing update packet received. 

F. BGP peers can be configured with different passwords. 

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Q5. 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 

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Q6. 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. 

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Q7. You need to enable the "local-router" serial 0/0 connection to the "remote-router" to be authenticated using the "C!sco!23" password. The password cannot be sent in cleartext between the two routers. The "remote-router" has already been configured with all the required configurations. 

Which four Cisco IOS configurations are necessary? (Choose four.) 

A. hostname local-router 

B. int s0/0 

C. encap hdlc int s0/0 

D. encap ppp int s0/0 

E. ppp authentication pap int s0/0 

F. ppp authentication chap ip domain-name test.com 

G. username remote-router password C!sco!23 

H. username local-router password C!sco!23 

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Q8. 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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Q9. Refer to the exhibit. 

Which two options are the number of broadcast domains and collision domains shown in 

the exhibit? (Choose two.) 

A. 1 collision domain 

B. 2 collision domains 

C. 4 collision domains 

D. 7 collision domains 

E. 1 broadcast domain 

F. 2 broadcast domains 

G. 4 broadcast domains 

H. 7 broadcast domains 

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Q10. 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 

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