SNMP

Question 1

What is SNMP?

Answer 1

A standard protocol used to manage and monitor network devices such as routers, switches, and servers.

Question 2

What does SNMP allow network administrators to do?

Answer 2

Monitor network performance, diagnose problems, and configure network devices from a central location.

Question 3

What are the two main components in SNMP?

Answer 3

Manager and Agent.

Question 4

What role does the manager play in SNMP?

Answer 4

Controls and monitors a set of agents.

Question 5

What is an agent in the context of SNMP?

Answer 5

A router or host that runs the SNMP server program.

Question 6

What information does an agent keep in SNMP?

Answer 6

Performance information in a database.

Question 7

How does a manager interact with an agent?

Answer 7

By requesting information and forcing the agent to perform tasks.

Question 8

What is a trap in SNMP?

Answer 8

A warning message sent by an agent to the manager when an unusual situation is detected.

Question 9

What are the three basic ideas of management with SNMP?

Answer 9

• A manager checks an agent by requesting information
• A manager forces an agent to perform a task
• An agent warns the manager of unusual situations.

Question 10

What are the two components used by SNMP for management tasks?

Answer 10

• Structure of Management Information (SMI)
• Management Information Base (MIB).

Question 11

What does SMI define?

Answer 11

The general rules for naming objects and defining their types.

Question 12

What is the function of MIB?

Answer 12

Creates a collection of named objects, their types, and their relationships.

Question 13

What does SNMP define regarding packets?

Answer 13

The format of packets exchanged between a manager and an agent.

Question 14

How does SMI handle object naming?

Answer 14

Uses an object identifier which is a hierarchical identifier based on a tree structure.

Question 15

What are the two broad categories of data type in SMI?

Answer 15

• Simple data types
• Structured data types.

Question 16

What is a sequence data type in SMI?

Answer 16

A combination of simple data types, not necessarily of the same type.

Question 17

What is a sequence of data type in SMI?

Answer 17

A combination of simple data types all of the same type or a combination of sequence data types all of the same type.

Question 18

What standard does SMI use for encoding data?

Answer 18

Basic Encoding Rules (BER).

Question 19

What are the components of the triplet format in BER?

Answer 19

• Tag
• Length
• Value.

Question 20

What does the tag in BER define?

Answer 20

The type of data.

Question 21

What is the first step in a simple SNMP scenario?

Answer 21

A manager station (SNMP client) sends a message to an agent station (SNMP server).

Question 22

True or False: SNMP can monitor devices made by different manufacturers.

Answer 22

True.

Question 23

Fill in the blank: A managed station in SNMP is called an _______.

Answer 23

Agent.

Question 24

What does SNMP store and interpret?

Answer 24

The values of objects already declared by MIB.

Question 25

What must the most significant bit be if the length field is 1 byte?

Answer 25

0 ## Footnote The other 7 bits define the length of the data.

Question 26

What defines the number of bytes needed to define the length if it is more than 1 byte?

Answer 26

The most significant bit of the first byte must be 1 ## Footnote The other 7 bits of the first byte define the number of bytes needed.

Question 27

What is the value field coded according to?

Answer 27

The rules defined in BER.

Question 28

What does MIB2 stand for?

Answer 28

Management Information Base, version 2.

Question 29

What are the 10 different groups in MIB2?

Answer 29

* system * interface * address translation * ip * icmp * tcp * udp * egp * transmission * snmp

Question 30

What does the system object in MIB2 define?

Answer 30

General information about the node, such as name, location, and lifetime.

Question 31

What information does the interface object in MIB2 define?

Answer 31

Information about all of the interfaces of the node including interface number, physical address, and IP address.

Question 32

What does the address translation object in MIB2 define?

Answer 32

Information about the ARP table.

Question 33

What does the ip object in MIB2 define?

Answer 33

Information related to IP, such as the routing table and the IP address.

Question 34

What does the icmp object in MIB2 define?

Answer 34

Information related to ICMP, such as the number of packets sent and received and total errors created.

Question 35

What does the tcp object in MIB2 define?

Answer 35

General information related to TCP, such as the connection table, time-out value, number of ports, and number of packets sent and received.

Question 36

What does the udp object in MIB2 define?

Answer 36

General information related to UDP, such as the number of ports and number of packets sent and received.

Question 37

What does the snmp object in MIB2 define?

Answer 37

General information related to SNMP itself.

Question 38

How are simple variables accessed in MIB?

Answer 38

Use the id of the group followed by the id of the variable.

Question 39

What is the instance suffix for a simple variable?

Answer 39

A zero.

Question 40

How do you identify a table in MIB?

Answer 40

Use the table id.

Question 41

What is the id of the table in the udp group?

Answer 41

5.

Question 42

What does SNMP stand for?

Answer 42

Simple Network Management Protocol.

Question 43

What are the eight types of protocol data units (PDUs) defined in SNMPv3?

Answer 43

* GetRequest * GetNext-Request * GetBulkRequest * SetRequest * Response * Trap * InformRequest * Report

Question 44

What elements make up a message in SNMPv3?

Answer 44

* Version * GlobalData * SecurityParameters * ScopePDU

Question 45

What does the VarBind sequence contain in a GetRequest PDU?

Answer 45

Only one VarBind.

Question 46

What is the object identifier related to retrieving the number of UDP datagrams received by a router?

Answer 46

1.3.6.1.2.1.7.1.0.

Question 47

What is the total length of the SNMP message in Example 24.5?

Answer 47

113 bytes.

Question 48

What type of information does SNMP allow a manager to retrieve?

Answer 48

The value of an object defined in an agent.

Question 49

What is one function of an agent in SNMP?

Answer 49

To send an alarm message about an abnormal situation to the manager.

Question 50

Fill in the blank: SNMP uses both ______ and MIB in Internet network management.

Answer 50

SMI.