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QUESTION 80
What are two valid reasons to upgrade Cisco IOS XR Software? (Choose two.)
A. A few software bugs that have no service impact.
B. There are no rules for this device in the policy table.
C. A new line card needs to be added, and it is not supported in the current installed release.
D. Current bandwidth utilization is poor, and bandwidth efficiency needs to be increased.
E. Already running BGP, and need a specific BGP feature that is not supported in current installed release. “First Test, First Pass” – www.lead2pass.com 26 Cisco 642-770 Exam

Correct Answer: CE Section: (none) Explanation
QUESTION 81
Which two statements about SNMP in Cisco IOS and IOS XR Software are true? (Choose two.)
A. Informs are not supported in Cisco IOS XR Software.
B. Informs are not supported in Cisco IOS Software.
C. SNMPv3 is not supported in Cisco IOS Software.
D. MIBs in Cisco IOS XR Software are handled by four different mibd processes, which are controlled by snmpd.
E. SNMPv3 privacy (encryption) is not supported in Cisco IOS XR Software.

Correct Answer: AD Section: (none) Explanation
Explanation/Reference:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/system_management/configuration/guide/ yc37snmp.html#wp1027184
Note Inform requests (inform operations) are not supported on the Cisco IOS XR software.
Traps are less reliable than informs because the receiver does not send any acknowledgment when it receives a trap. The sender cannot determine if the trap was received. An SNMP manager that receives an inform request acknowledges the message with an SNMP response protocol data unit (PDU). If the manager does not receive an inform request, it does not send a response. If the sender never receives a response, the inform request can be sent again. Thus, informs are more likely to reach their intended destination.
However, traps are often preferred because informs consume more resources in the router and in the network. Unlike a trap, which is discarded as soon as it is sent, an inform request must be held in memory until a response is received or the request times out. Also, traps are sent only once, and an inform may be retried several times. The retries increase traffic and contribute to a higher overhead on the network. Thus, traps and inform requests provide a trade-off between reliability and resources.
In Figure 2, the agent router sends a trap to the SNMP manager. Although the manager receives the trap, it does not send any acknowledgment to the agent. The agent has no way of knowing that the trap reached its destination.
QUESTION 82
Two of the core routers are not able to establish routing protocol adjacency with each other. To best effectively troubleshoot this issue, which four things should be verified? (Choose four.)
A. The routers interface link that provides connectivity between the two routers is in the UP state.
B. The routing protocol configurations on each router match (such as routing protocol timers and routing protocol authentication).
C. NTP is configured on both routers and the clocks are synchronized between the two routers.
D. The two routers can ping each other.
E. If a firewall exists in the path between the two routers, it is properly configured.
F. The MPLS (LDP) adjacency is up between the two routers.

Correct Answer: ABDE Section: (none) Explanation
QUESTION 83
The CNR server in the network has gone down. Which two network services may be affected by this event? (Choose two.)
A. DHCP
B. TFTP
C. DNS
D. AAA
E. FTP
F. NetFlow

Correct Answer: AC Section: (none) Explanation
Explanation/Reference:
Cisco Network Registrar provides scalable, reliable, and integrated Domain Name System (DNS), Dynamic Host Configuration Protocol (DHCP), and IP Address Management (IPAM) – DDI services for both IPv4 and IPv6. The solution offers: Proven scalability: DHCP services for over 50 million devices in a single customer deployment Reliability: DHCP safe-failover, support for high-availability DNS, and unsurpassed avalanche prevention to reduce downtime after network outages Single platform: Full IPv6 support helps automate and manage the transition from IPv4 to IPv6 by leveraging dual-stack deployment on a single server High-performance provisioning of IP addresses for all services including mobile, cloud, and video
Benefits Fast: Able to assign over 47,000 DHCP leases per second Cloud ready: Multitenant capabilities enable cloud-based DHCP and DNS Easy to manage: Helps reduce operational errors and costs Low risk and reduced startup costs: Able to be deployed in a virtualized environment
http://www.cisco-bt-portal.com/iusr/mat/cisco_nmtg_cnmpsg.pdf

QUESTION 84
According to Cisco IOS Management Best Practices, which eight items are included in the Global Standard Configuration Template? (Choose eight.)
A. service commands
B. IP commands
C. VTY commands
D. console port commands “First Test, First Pass” – www.lead2pass.com 27 Cisco 642-770 Exam
E. logging commands
F. device commands
G. AAA commands
H. SNMP commands
I. banner commands
J. HA commands

Correct Answer: ABCDEGHI Section: (none) Explanation
Explanation/Reference: QUESTION 85

According to Cisco IOS Management Best Practices, which four areas are specified for configuration consistency? (Choose four.)
A. Global Standard Configuration Template
B. Device Naming Convention
C. Sample Protocol Standard Configuration Template
D. HA Standards Template
E. IP Standards Template
F. Documentation Standards Template
G. Configuration Restoration Convention

Correct Answer: ABCE Section: (none) Explanation
Explanation/Reference: QUESTION 86

According to Cisco IOS Management Best Practices, which three attributes should be fulfilled in the Device Naming Convention? (Choose three.)
A. identify the device
B. name the device
C. device type
D. device location
E. device hierarchy

Correct Answer: ACD Section: (none) Explanation
Explanation/Reference: QUESTION 87

Which four criteria determine when to escalate an incident to a vendor? (Choose four.)
A. severity of incident
B. personal relationships with vendors
C. escalation procedures
D. applicable service level agreements
E. CIO request from Fortune 500 company with no SLA
F. support agreement with vendor

Correct Answer: ACDF Section: (none) Explanation
QUESTION 88
“First Test, First Pass” – www.lead2pass.com 28 Cisco 642-770 Exam
Which three conditions have the highest probability of immediate escalation? (Choose three.)
A. automated response
B. when the cause is not immediately known
C. per SLA requirements
D. when Level-2 support has nothing in its queue
E. when there is substantial impact and risk to the business

Correct Answer: ACE Section: (none) Explanation
QUESTION 89
Which term is used to describe a set of IT infrastructure components that are typically released together?
A. release unit
B. deployment bundle
C. deployed package
D. PIE

Correct Answer: A Section: (none) Explanation
QUESTION 90
Which two are recognized KPIs for service validation and testing? (Choose two.)
A. number of identified errors
B. component failure rate
C. user approval rating for services
D. percentage of failed service-acceptance tests

Correct Answer: AD Section: (none) Explanation
Explanation/Reference:
http://www.monolith-software.com/blog/2009/09/best-practices-kpis-for-network-management/
http://acolyst.com/wp-content/uploads/2010/12/itil-service-validation-testing-tb-v2_234995.pdf
QUESTION 91
Which two are defined as management areas within ITIL? (Choose two.)
A. change management
B. configuration management
C. hardware management
D. documentation management

Correct Answer: AB Section: (none) Explanation
QUESTION 92
MTTR can be used as a metric in which of these areas?
A. change management
B. configuration management
C. performance management
D. incident management “First Test, First Pass” – www.lead2pass.com 29 Cisco 642-770 Exam

Correct Answer: C Section: (none) Explanation
QUESTION 93
According to Cisco leading practices, which four benefits can be realized from a reactive review of trouble tickets? (Choose four.)
A. identification of recurring issues that may indicate a problem
B. justification for budget to add headcount so this task can be performed proactively
C. identification of a problem in a particular hardware platform or line card
D. identification of excessive complaints from particular groups or individuals
E. identification of a skills deficit or training need for one or more members of the staff
F. identification of opportunities for improvement in the change management process
G. identification of a bug in a specific release of software

Correct Answer: ACEG Section: (none) Explanation QUESTION 94
You have built a new facility and are now testing connectivity. All routers at the new facility can ping their directly connected neighbors, but cannot ping any other routers. Which statement is true?
A. A layer 1 issue at the facility prevents all other layers from operating.
B. Layer 1 is operational, but an issue with layer 2 causes frame errors.
C. Layer 2 is operational, but layer 1 issues prevent packet forwarding.
D. Layers 1 and 2 are working properly, but layer 3 needs more information to forward packets.

Correct Answer: D Section: (none) Explanation
QUESTION 95
When a traceroute is executed, if a packet does not return within the expected timeout window, what is printed to the screen?
A. an exclamation point (!)
B. a period (.)
C. an asterisk (*)
D. Time Out
E. TTL expired

Correct Answer: C Section: (none) Explanation
QUESTION 96
Cisco IOS XR Software was designed with three partitions or separate planes. Which are the three planes?
A. control, data, and management
B. application, data, and management
C. control, services, and management “First Test, First Pass” – www.lead2pass.com 30 Cisco 642-770 Exam
D. application, services, and data
E. data, services, and control

Correct Answer: A
Section: (none)
Explanation

Explanation/Reference:
Control Plane Configuration Management

Any routing protocol configuration (IGP or EGP) is considered to be global to the system. The routing protocol configuration is controlled by RPs and distributed route processors (DRP). Border Gateway Protocol (BGP) could be operating in distributed mode; however, it is also part of the global configuration. Control plane services are separated from the physical interfaces from a configuration standpoint; they are unaware of the actual interface’s state. When an MSC or Shared Port Adaptor (SPA) is inserted in the system, the control plane configuration becomes active if you have configured any protocol for the interface. When you remove anMSC or SPA, the protocol configuration does not change; however, it becomes inactive for the specific SPA or interface. In IOS XR when you configure a routing protocol, you specify the interface names and not the network address. You can configure the interface (name) under a routing protocol in IOS XR even for an interface that is not yet created or in existence. The protocols will become operational on the interfaces once the interface becomes active. This aspect is also referred to as interface forward referencing.

Data Plane Configuration Management
Any data plane features that are specific to the MSC are part of the Data Plane Configuration. Examples of such features include IPv4, IPv6, and Layer 2 protocol. Therefore, these will be provisioned and managed by theMSC. Data plane configurations are unaware of the control plane applications that might be active or enabled over the physical interface. Processes on the node apply the appropriate Layer 2 and Layer 3 protocols to the interface. Control and data plane separation helps to achieve high availability goals. Any change in the control processes (such as BGP) does not impact theMSC operation as they are separated. Configuration scalability is increased as data plane configuration and detailed state information is not held on management node. During reboots, data plane configuration restoration occurs in parallel on multiple nodes, which helps the system to scale.
Cisco IOS XR operating software maintains two resource management planes from a router access perspective:

Admin plane


Secure domain router (SDR) plane
Admin Plane The admin plane maintains responsibility for the owner SDR, and certain administrative responsibilities for all other nonowner SDRs. These functions include user control over power, fan-trays, fabric modules, and environmental aspects of the router required to maintain normal operations. The admin plane is accessible only to a type of user known as the root-system user. IOS XR requires configuration of a root-system user using the initial setup dialog. IOS XR router does not allow the system to operate without a user group configuration. If all users and external AAA configurations get deleted, IOS XR prompts the next logged-in user for a new username and password.
SDR Plane As mentioned in the preceding section, the root-system user has the highest level of privilege for the router operation. This user has the ability to provision SDRs and create root SDR users. After being created, root-lr (the abbreviation lr in root-lr stands for logical router) users take most of the responsibilities from the root-system user for the SDR. The root-lr user is the equivalent of root-system user from an SDR perspective and has jurisdiction only for the particular SDR on which it is defined. A detailed discussion of SDR plane is included in Chapter 11, “Secure Domain Router.”
QUESTION 97
Which process is a fundamental process and the foundation of Cisco IOS XR Software that is responsible for restarting other processes as predefined by Respawn flag ON or OFF?
A. RIB
B. FIB
C. netIO
D. sysdb
E. sysmgr
F. wdsysmon

Correct Answer: E Section: (none) Explanation
Explanation/Reference:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.4/troubleshooting/guide/tr34pro.html

System Manager
Each process is assigned a job ID (JID) when started. The JID does not change when a process is started, stopped, then restarted. Each process is also assigned a process ID (PID) when started, but this PID changes each time the process is stopped and restarted.
The System Manager (sysmgr) is the fundamental process and the foundation of the system. The sysmgr is responsible for monitoring, starting, stopping, and restarting almost all processes on the system. The restarting of processes is predefined (respawn flag on or off) and honored by sysmgr. The sysmgr is the parent of all processes started on boot-up and by configuration. Two instances are running on each node providing a hot standby process level redundancy. Each active process is registered with the SysDB and once started by the sysmgr active process the sysmgr is notified when it is running. If the sysmgr active process is dying the standby process takes over the active state and a new standby process is generated.
The sysmgr running on the line card (LC) handles all the system management duties like process creation, re-spawning, and core-dumping relevant to that node.
The sysmgr itself is started on bootup by the initialization process. Once the sysmgr is started, initialization hands over the ownership of all processes started by initialization to sysmgr and exits.
Drag and Drop QUESTION 1

Select and Place:

Correct Answer:
Section: (none) Explanation
Explanation/Reference:
DNSUDP 53 NTPUDP 123 AAA (RADIUS)UDP 1812/1813
QUESTION 2
Select and Place: Correct Answer:

Section: (none) Explanation
Explanation/Reference:
Explanation:
Sample Protocol Standard Configuration Template:

ACL Configuration ATM Configuration FR Configuration IP Routing Configuration Spanning Tree Configuration

IP Standards Template:
IP Address used Routing Protocol Configuration Routing Protocol used Subnet Size

QUESTION 3

Select and Place: Correct Answer:

Section: (none) Explanation
Explanation/Reference:

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Cisco 642-770 Test Prep, Recenty Updated Cisco 642-770 Exam Guide Sale