Cisco 300-135 Exam Questions and Answers 2021

NEW QUESTION 1
Scenario:
You have been asked by your customer to help resolve issues in their routed network. Their network engineer has deployed HSRP. On closer inspection HSRP doesn't appear to be operating properly and it appears there are other network problems as well. You are to provide solutions to all the network problems.





Examine the configuration on R5. Router R5 do not see any route entries learned from R4; what could be the issue?

• A. HSRP issue between R5 and R4
• B. There is an OSPF issue between R5and R4
• C. There is a DHCP issue between R5 and R4
• D. The distribute-list configured on R5 is blocking route entries
• E. The ACL configured on R5 is blocking traffic for the subnets advertised from R4.

Answer: B

Explanation: If we issue the “show ip route” and “show ip ospf neighbor” commands on R5, we see that there are no learned OSPF routes and he has no OSPF neighbors.

NEW QUESTION 2
Which of the following is not considered a common approach to narrow the field of potential problem causes? (Choose the best answer.)

• A. Following the traffic path
• B. Top-down
• C. Comparing configurations
• D. Bottom-up
• E. Divide and conquer
• F. Examine SLAs

Answer: F

NEW QUESTION 3
You are troubleshooting a connection between a console port on one router and an AUX port on another router. Which cable type must be used for this connection?

• A. Crossover cable
• B. Straight cable
• C. Rollover cable
• D. DB-25 DCE cable

Answer: A

NEW QUESTION 4
Which of the following are shared distribution tree characteristics? (Choose all that apply.)

• A. Memory requirements are higher for shared distribution tree than for source distribution tree.
• B. Creates a tree from a central RP to all last-hop routers.
• C. Uses a rendezvous point.
• D. An optimal path is created between each source router and each last-hop router.
• E. Place (S,G) entry in each router's multicast routing table.
• F. Place (*,G) entry in a router's multicast routing to table.

Answer: CF

NEW QUESTION 5
The implementations group has been using the test bed to do a ‘proof-of-concept’ that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions. The fault condition is related to which technology?

• A. BGP
• B. NTP
• C. IP NAT
• D. IPv4 OSPF Routing
• E. IPv4 OSPF Redistribution
• F. IPv6 OSPF Routing
• G. IPv4 layer 3 security

Answer: D

Explanation: On R1, for IPV4 authentication of OSPF the command is missing and required to configure------ ip ospf authentication message-digest

NEW QUESTION 6
Refer to the exhibit.

A large number of TCP sessions attempting to connect to a router cause memory leakage and the router to hang. During troubleshooting the client configures a service policy and applies it to the control plane resulting in the error shown What is the root cause of this error message?

• A. The router license is missing in order to configure the policy map
• B. The bandwidth command is not supported for policy maps configured for CoPP
• C. Cisco routers lack the support for protecting the control plane.
• D. The service policy should be configured for the output direction

Answer: A

NEW QUESTION 7
Which of the following options represents the correct sequence of DHCP messages after a client initially boots?

• A. DHCPREQUEST, DHCPOFFER, DHCPDISCOVER, DHCPACK
• B. DHCPDISCOVER, DHCPOFER, DHCPREQUEST, DHCPACK
• C. DHCPOFFER, DHCPACK, DHCPREQUEST, DHCPDISCOVER
• D. DHCPDISCOVER, DHCPREQUEST, DHCPOFFER, DHCPACK
• E. DHCPREQUE5T, DHCPDISCOVER, DHCPOFFER, DHCPACK
• F. DHCPDISCOVER, DHCPACK, DHCPREQUEST, DHCPOFFER

Answer: B

NEW QUESTION 8
The implementations group has been using the test bed to do a ‘proof-of-concept’ that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions. The fault condition is related to which technology?

• A. NTP
• B. IP DHCP Server
• C. IPv4 OSPF Routing
• D. IPv4 EIGRP Routing
• E. IPv4 Route Redistribution
• F. IPv6 RIP Routing
• G. IPv6 OSPF Routing
• H. IPv4 and IPv6 Interoperability
• I. IPv4 layer 3 security

Answer: D

Explanation: On R4, IPV4 EIGRP Routing, need to change the EIGRP AS number from 1 to 10 since DSW1 & DSW2 is configured to be in EIGRP AS number 10.

Topic 15, Ticket 10 : VLAN Access Map
Topology Overview (Actual Troubleshooting lab design is for below network design)
Client Should have IP 10.2.1.3
EIGRP 100 is running between switch DSW1 & DSW2
OSPF (Process ID 1) is running between R1, R2, R3, R4
Network of OSPF is redistributed in EIGRP
BGP 65001 is configured on R1 with Webserver cloud AS 65002
HSRP is running between DSW1 & DSW2 Switches
The company has created the test bed shown in the layer 2 and layer 3 topology exhibits. This network consists of four routers, two layer 3 switches and two layer 2 switches.
In the IPv4 layer 3 topology, R1, R2, R3, and R4 are running OSPF with an OSPF process number 1. DSW1, DSW2 and R4 are running EIGRP with an AS of 10. Redistribution is enabled where necessary.
R1 is running a BGP AS with a number of 65001. This AS has an eBGP connection to AS 65002 in the ISP’s network. Because the company’s address space is in the private range.
R1 is also providing NAT translations between the inside (10.1.0.0/16 & 10.2.0.0/16) networks and outside (209.65.0.0/24) network.
ASW1 and ASW2 are layer 2 switches.
NTP is enabled on all devices with 209.65.200.226 serving as the master clock source.
The client workstations receive their IP address and default gateway via R4’s DHCP server.
The default gateway address of 10.2.1.254 is the IP address of HSRP group 10 which is running on DSW1 and DSW2.
In the IPv6 layer 3 topology R1, R2, and R3 are running OSPFv3 with an OSPF process number 6. DSW1, DSW2 and R4 are running RIPng process name RIP_ZONE.
The two IPv6 routing domains, OSPF 6 and RIPng are connected via GRE tunnel running over the underlying IPv4 OSPF domain. Redistrution is enabled where necessary.
Recently the implementation group has been using the test bed to do a ‘proof-of-concept’ on several
implementations. This involved changing the configuration on one or more of the devices. You will be presented with a series of trouble tickets related to issues introduced during these configurations.
Note: Although trouble tickets have many similar fault indications, each ticket has its own issue and solution.
Each ticket has 3 sub questions that need to be answered & topology remains same. Question-1 Fault is found on which device,
Question-2 Fault condition is related to,
Question-3 What exact problem is seen & what needs to be done for solution
==============================================================================


Client 1 is unable to ping IP 209.65.200.241
Solution
Steps need to follow as below:-
When we check on client 1 & Client 2 desktop we are not receiving DHCP address from R4 ipconfig ----- Client will be receiving IP address 10.2.1.3
From Client PC we can ping 10.2.1.254….
But IP 10.2.1.3 is not able to ping from R4, R3, R2, R1


Change required: On DSW1, VALN ACL, Need to delete the VLAN access-map test1 whose action is to drop access-list 10; specifically 10.2.1.3
------------------------------------------------------------------------------------------------------------------------------

NEW QUESTION 9
The implementations group has been using the test bed to do a ‘proof-of-concept’ that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions. What is the solution to the fault condition?

• A. Disable auto summary on the EIGRP process
• B. Enable EIGRP on the FastEthernet0/0 and FastEthernet0/1 interface using the no passive-interface command.
• C. Change the AS number on the EIGRP routing process from 1 to 10 to much the AS number used on DSW1 and DSW2.
• D. Under the EIGRP process, delete the network 10.1.4.0 0.0.0.255 command and enter the network 10.1.4.4 0.0.0.252 and 10.1.4.8 0.0.0.252 commands.

Answer: C

Explanation: On R4, IPV4 EIGRP Routing, need to change the EIGRP AS number from 1 to 10 since DSW1 & DSW2 is configured to be in EIGRP AS number 10.
===============================================================================

NEW QUESTION 10
Refer to exhibit.

If all routers are sharing routes via OSPF area 0, which two configuration can you apply to R2 and R3 so that they can enable a GRE tunnel between them? (Choose two)

• A. R2#interface tunnel 0 Description To HQ-A316:56369Ip address 10.10.23.2.255.255.255.0Tunnel source GigabitEthernet0/0 Tunnel destination 192.168.13.3
• B. R3#interface tunnel 0 Description To HQ-B652:4289Ip address 10.10.23.2.255.255.255.0Tunnel source GigabitEthernet0/0 Tunnel destination 192.168.21.2
• C. R2#interface tunnel 0 Description To HQ-A316:56369Ip address 10.10.23.2.255.255.255.0Tunnel source GigabitEthernet0/1 Tunnel destination 192.168.131
• D. R2#interface tunnel 0 Description To HQ-A316:56369Ip address 10.10.23.2.255.255.255.0Tunnel source 192.168.21.2Tunnel destination 192.168.13.3
• E. R3#interface tunnel 0 Description To HQ-B652:4289Ip address 10.10.23.3.255.255.255.0Tunnel source GigabitEthernet0/0 Tunnel destination 192.168.13.3

Answer: BD

NEW QUESTION 11
Which of the following are correct statements?

• A. EIGRP advertises the best routes to its neighbor.
• B. EIGRP uses "cost" to determine best path.
• C. EIGRP allows unequal cost load balancing.
• D. OSPF requires neighbor adjacencies before updates are sent.
• E. EIGRP advertises all routes to its neighbor.
• F. OSPF allows unequal cost load balancing.

Answer: ACD

NEW QUESTION 12
The implementation group has been using the test bed to do an IPv6 'proof-of-concept1. After several changes to the network addressing and routing schemes, a trouble ticket has been opened indicating that the loopback address on R1 (2026::111:1) is not able to ping the loopback address on DSW2 (2026::102:1).
The fault condition is related to which technology?

• A. NTP
• B. IPv4 OSPF Routing
• C. IPv6 OSPF Routing
• D. IPV4 and IPV6 Interoperability
• E. IPv4 layer 3 security

Answer: D

Explanation: As explained earlier, the problem is with route misconfigured tunnel modes on R3. R3 is using tunnel mode ipv6, while R4 is using the default of GRE.
Topic 22, Lab EBGP and IBGP

NEW QUESTION 13
The implementations group has been using the test bed to do a ‘proof-of-concept’ that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions. The fault condition is related to switch technology?

• A. NTP
• B. Switch-to-Switch Connectivity
• C. Loop Prevention
• D. Access Vlans
• E. VLAN ACL Port ACL
• F. Switch Virtual Interface
• G. Port Security

Answer: D

Explanation: The problem here is that VLAN 10 is not configured on the proper interfaces on switch ASW1.

Topic 8, Ticket 3 : OSPF Authentication
Topology Overview (Actual Troubleshooting lab design is for below network design)
Client Should have IP 10.2.1.3
EIGRP 100 is running between switch DSW1 & DSW2
OSPF (Process ID 1) is running between R1, R2, R3, R4
Network of OSPF is redistributed in EIGRP
BGP 65001 is configured on R1 with Webserver cloud AS 65002
HSRP is running between DSW1 & DSW2 Switches
The company has created the test bed shown in the layer 2 and layer 3 topology exhibits. This network consists of four routers, two layer 3 switches and two layer 2 switches.
In the IPv4 layer 3 topology, R1, R2, R3, and R4 are running OSPF with an OSPF process number 1. DSW1, DSW2 and R4 are running EIGRP with an AS of 10. Redistribution is enabled where necessary.
R1 is running a BGP AS with a number of 65001. This AS has an eBGP connection to AS 65002 in the ISP’s network. Because the company’s address space is in the private range.
R1 is also providing NAT translations between the inside (10.1.0.0/16 & 10.2.0.0/16) networks and outside (209.65.0.0/24) network.
ASW1 and ASW2 are layer 2 switches.
NTP is enabled on all devices with 209.65.200.226 serving as the master clock source.
The client workstations receive their IP address and default gateway via R4’s DHCP server.
The default gateway address of 10.2.1.254 is the IP address of HSRP group 10 which is running on DSW1 and DSW2.
In the IPv6 layer 3 topology R1, R2, and R3 are running OSPFv3 with an OSPF process number 6. DSW1, DSW2 and R4 are running RIPng process name RIP_ZONE.
The two IPv6 routing domains, OSPF 6 and RIPng are connected via GRE tunnel running over the underlying IPv4 OSPF domain. Redistrution is enabled where necessary.
Recently the implementation group has been using the test bed to do a ‘proof-of-concept’ on several
implementations. This involved changing the configuration on one or more of the devices. You will be presented with a series of trouble tickets related to issues introduced during these configurations.
Note: Although trouble tickets have many similar fault indications, each ticket has its own issue and solution.
Each ticket has 3 sub questions that need to be answered & topology remains same. Question-1 Fault is found on which device,
Question-2 Fault condition is related to,
Question-3 What exact problem is seen & what needs to be done for solution
===============================================================================


Client is unable to ping IP 209.65.200.241
Solution
Steps need to follow as below:-
When we check on client 1 & Client 2 desktop we are not receiving DHCP address from R4 Ipconfig ----- Client will be receiving IP address 10.2.1.3
IP 10.2.1.3 will be able to ping from R4 , R3, R2 but not from R1

Check for neighborship of ospf
sh ip ospf nei ----- Only one neighborship is forming with R2 & i.e. with R3
Since R2 is connected to R1 & R3 with routing protocol ospf than there should be 2 neighbors seen but only one is seen
Need to check running config of R2 & R3 for interface
Sh run -------------------------- Interface Serial0/0/0/0.12 on R2

Sh run -------------------------- Interface Serial0/0/0/0 on R1
Change required: On R1, for IPV4 authentication of OSPF command is missing and required to configure------ ip ospf authentication message-digest

NEW QUESTION 14
You want to troubleshoot an OSPF adjacency issue. Which two tasks must you perform? (Choose two.)

• A. Issue the debug ip ospf nsf command to identity the cause.
• B. Issue the debug ip ospf adj command to identify the cause.
• C. Verify that the router IDs on the two routers match.
• D. Verify that the subnet masks on the two routers match.
• E. Verify that the process IDs on the two routers match.

Answer: BD

NEW QUESTION 15
Which of the following are TACACS+ characteristics? (Choose all that apply.)

• A. Cisco proprietary
• B. Standards-based protocol
• C. Provides separate services for authentication, authorization, and accounting
• D. Encrypts only the password
• E. Uses UDP for a transport layer
• F. Encrypts the entire packet

Answer: ACF

NEW QUESTION 16
If you are troubleshooting a spann.ng-tree loop on a VLAN, which standard troubleshooting approach is most appropriate for identifying the cause of the loop?

• A. divide and conquer
• B. top-down
• C. bottom-up
• D. follow-the-path

Answer: D

NEW QUESTION 17
Scenario:
A customer network engineer has edited their OSPF network configuration and now your customer is experiencing network issues. They have contacted you to resolve the issues and return the network to full functionality.







The 6.6.0.0 subnets are not reachable from R4. how should the problem be resolved?

• A. Edit access-list 46 in R6 to permit all the 6.6.0.0 subnets
• B. Apply access-list 46 in R6 to a different interface
• C. Apply access-list 1 as a distribute-list out under router ospf 100 in R4
• D. Remove distribute-list 64 out on R6
• E. Remove distribute-list 1 in ethernet 0/1 in R4
• F. Remove distribute-list 1 in ethernet 0/0 in R4

Answer: D

Explanation: Here we see from the running configuration of R6 that distribute list 64 is being used in the outbound direction to all OSPF neighbors.

However, no packets will match the 6.6.0.0 in this access list because the first line blocks all 6.0.0.0 networks, and since the 6.6.0.0 networks will also match the first line of this ACL, these OSPF networks will not be advertised because they are first denied in the first line of the ACL.

NEW QUESTION 18
Refer to the Exhibit:

Which output is expected in the blank line for the OSPF adjacency process?

• A. DOWN
• B. EXSTART
• C. EXCHANGE
• D. LOADING

Answer: B

Explanation: You can check the output of "debug ip ospf adj" here: