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2021 Feb 640-875 pass4sure:
Q1. What are the four steps to enable SSH v1 and v2 server on Cisco IOS XR routers? (Choose four.)
A. Configure a host name.
B. Configure a domain name.
C. Generate a crypto key pair.
D. Import the router identity certificate and the CA root certificate to the router.
E. Configure an ISAKMP policy.
F. Bring up an SSH server using the ssh server command.
Answer: A,B,C,F
Explanation:
Q2. Which three statements about the Cisco IOS XR task-based user authorization method are true? (Choose three.)
A. A user's association with a particular user group links that user to a particular set of task IDs. A user that is associated with a task ID can execute any operation associated with that task ID.
B. Users can be assigned only to one user group.
C. Every user group is associated with one or more task groups.
D. Every task group is defined by a set of task IDs.
E. Each user is assigned a privilege level.
F. Each IOS XR CLI command is assigned a privilege level.
G. A task ID maps the IOS XR command to a privilege level.
Answer: A,C,D
Explanation:
Q3. 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.
Answer: A,B,C,D
Explanation:
Q4. 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
Answer: D,F
Explanation:
Q5. 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:
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Q6. 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
Answer: E
Explanation:
Q7. Which Cisco IOS XR CLI command displays the running state of each line card (including the fan tray) on the Cisco ASR 9000 Series Router?
A. RP/0/RSP0/CPU0:PE1#show platform
B. RP/0/RSP0/CPU0:PE1(admin)#show platform
C. RP/0/RSP0/CPU0:PE1#show hw-module fpd location all
D. RP/0/RSP0/CPU0:PE1(admin)#show hw-module fpd location all
E. RP/0/RSP0/CPU0:PE1#show version
F. RP/0/RSP0/CPU0:PE1(admin)#show version
Answer: B
Explanation:
Q8. 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
Answer: B,C,F
Explanation:
Q9. Which statement about SSH is true?
A. It is a TCP/IP transport layer protocol.
B. It uses TCP port number 22.
C. It securely encrypts Telnet.
D. It uses UDP port 23.
E. Passwords are sent in clear text.
F. It is an OSI network layer protocol.
Answer: B
Explanation:
Q10. When EIGRP is enabled on Cisco IOS XR, which EIGRP feature is on by default?
A. no auto-summary
B. stub routing
C. unequal cost paths load-balancing
D. no ip eigrp split-horizon
E. eigrp authentication
Answer: A
Explanation: