CH15 - Network Management Protocols

*What are the 8 levels of syslog?*

0 - Emergency - System is unusable 1 - Alert - Take immediate action 2 - Critical 3 - Error 4 - Warning 5 - Notice - Normal but significant events 6 - Informational 7 - Debug

What language are MIBs written in?

ASN.1 Abstract Syntax Notation 1

*Protocol that can be used to discover only Cisco network devices.*

CDP Cisco Discovery Protocol

Which 3 types of Encryption can be used in SNMPv3?

DES, 3DES, AES

*SNMP Message Type* Retrieves the value of a specific MIB variable

Get request

What are the 5 SNMP message types used in SNMPv1?

Get request GetNext request Get response Set request Trap

*SNMP Message Type* Contains the values of the requested variable

Get response

*SNMP Message Type* Reduces repetitive requests for MIB variables

GetBulk

What are the 2 additional message types used in SNMPv2

GetBulk Inform request

*SNMP Message Type* Retrieves the next issuance of the MIB variable

GetNext request

A set of IP packets within a specific timeslot that share a number of properties, such as the same source address, destination address, type of service, and protocol number.

IP flow

*SNMP Message Type* Alerts an SNMP manager of specific conditions with confirmation

Inform request

*A protocol option of discovering network devices in multivendor networks.*

LLDP Link Layer Discovery Protocol

Which 2 types of authentication can be used in SNMPv3?

MD5 or SHA

A collection of information that is stored on the local agent of the managed device. Organized hierarchically and are accessed by the NMS.

MIB Management Information Base

*Network Management Element* These are the devices managed by the NMS.

Managed devices

*Network Management Element* Reside in the managed devices and include SNMP agents and RMON agents.

Management agents

*Network Management Element* Run the applications that manage and monitor managed devices.

NMS

*Allows the tracking of IP flows as they are passed through routers and multilayer switches. Provides the necessary data for billing of network usage*

NetFlow

Enables you to gather more statistical information than RMON with fewer resources. It provides greater detail of the collected data, with date- and timestamping. It has greater scalability and does not require network probes.

NetFlow

What are the 3 major components of NetFlow?

NetFlow accounting Flow collector engines Network data analyzers

*Network Management Element* These are used to exchange management information between the NMS and the managed devices. The key examples are SNMP, MIB, and RMON.

Network management protocols and standards

*Remote Monitoring. Provides aggregate information of network statistics and LAN traffic.*

RMON

This version of SNMP provides authentication and privacy via usernames and access control by using key management. Security levels are implemented to determine which devices a user can read, write, or create.

SNMPv3

*SNMP Message Type* Modifies the value of a MIB variable

Set request

What is an example of an SNMP managed device?

Switch, router, or any device that contains an SNMP agent

*Reports state information based on facility and severity levels.*

Syslog

*SNMP Message Type* Transmits an unsolicited alarm condition

Trap

What are the 3 levels of security in SNMPv3?

noAuthNoPriv authNoPriv authPriv