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Internetworking with TCP/IP: Pearson New International Edition

Douglas E. Comer

Chapter 27

Network Management (SNMP) - all with Video Answers

Educators

Chapter Questions

Problem 1

Capture an SNMP packet with a network analyzer and decode the fields.

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01:15

Problem 2

Read the standard to find out how ASN. 1 encodes the first two numeric values from an object identifier in a single octet. What is the motivation for the encoding?

Melissa Salvador
Melissa Salvador
Numerade Educator

Problem 3

Suppose the MIB designers need to define a variable that corresponds to a twodimensional array. Explain how ASN. 1 notation can accommodate references to such a variable.

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Problem 4

What are the advantages and disadvantages of defining globally unique ASN.1 names for MIB variables?

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01:49

Problem 5

Consult the standards and match each field in Figure 27.12 with a corresponding ASN.1 definition.

John Mcalister
John Mcalister
Numerade Educator

Problem 6

If you have SNMP client code available, try using it to read MIB variables in a local router. What is the advantage of allowing arbitrary managers to read variables in all routers? The disadvantage?

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01:19

Problem 7

Read the MIB specification to find the definition of variable ipRoutingTable that corresponds to an IPv4 routing table. Design a program that will use SNMP to contact multiple routers and see if any entries in their forwarding tables cause a routing loop. Exactly what ASN. 1 names should such a program generate?

James Kiss
James Kiss
Numerade Educator

Problem 8

Extend the previous exercise to perform the same task for IPv6.

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Problem 9

Consider the implementation of an SNMP agent. Does it make sense to arrange MIB variables in memory exactly the way SNMP describes them? Why or why not?

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Problem 10

Argue that SNMP is a misnomer because SNMP is not "simple."

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Problem 11

Read about the IPsec security standard described in Chapter 29. If an organization uses IPsec, are the security features of SNMPv3 also necessary? Why or why not?

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Problem 12

Does it make sense to use SNMP to manage all devices? Why or why not? (Hint: consider a simple hardware device such as a DSL modem.)

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