RMON1 Questions & Answers

This set of Computer Network Multiple Choice Questions & Answers (MCQs) focuses on “RMON1”.

1. RMON1 was initially defined for data link level parameters of ________ LAN.
a) Ethernet
b) Token-Ring
c) Frame Relay
d) ATM
View Answer

Answer: a
Explanation: RMON1 was initially defined for data link level parameters of Ethernet LAN. It was then extended to token-ring LAN.

2. The commercial probes were fast enough to measure the packets traversing an FDDl ring.
a) True
b) False
View Answer

Answer: b
Explanation: To replace commercial tools special tools were developed for the study. The commercial probes were not fast enough to measure the packets traversing an FDDl ring. Hence, a promiscuous mode of counting the packets (function of a probe) was developed to measure traffic on the gateway.

3. _________ is used to define the ports to be monitored in a particular statistics, host, or matrix collection.
a) atmMatrix
b) portSelect
c) atmStats
d) portSelTable
View Answer

Answer: b
Explanation: The portSelect group addresses port selection. It is used to define the ports to be monitored in a particular statistics, host, or matrix collection. It contains two tables. The portSelGrpTable controls the set-up of ports and ATM connection selection criteria used on behalf of any collection associated with entries in this table, such as atmHostTable. The portSelTable is then used to control the set-up of selection criteria for a single ATM port.

4. RMON probe is a type of probe measures traffic at the cell _________ level only.
a) header
b) footer
c) bottom
d) downward
View Answer

Answer: a
Explanation: The RMON probe is an embedded probe with access to the switch fabric. However, this type of probe measures traffic at the cell header level only.

5. At the data link sub layer, ATM RMON measures packets and frames.
a) True
b) False
View Answer

Answer: b
Explanation: At the data link sub layer, ATM RMON measures cells instead of packets or frames, and provides cell-based per-host and per-conversation traffic statistics.

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6. The ________ is an inventory of the protocols that the probe can monitor.
a) protocol distribution group
b) network-layer host group
c) address map group
d) protocol directory group
View Answer

Answer: d
Explanation: The protocol directory group is an inventory of the protocols that the probe can monitor. The capability of the probe can be altered by reconfiguring the protocolDirTable. The protocols range from the data link control layer to the application layer.

7. RMON1 dealt primarily with data associated with the OSI ______ layer.
a) network
b) transport
c) data-link
d) physical
View Answer

Answer: c
Explanation: RMON1 is covered by RFC 1757 for Ethernet LAN and RFC 1513. RMON in general and RMON1 specifically, performs numerous functions at the data link layer. Hence it can be said that RMON1 majorly dealt with data that associated with data-link layer of the OSI model.

8. Which of the following groups can generate a report of the top N protocol conversation?
a) application-layer host group
b) application-layer matrix
c) probe configuration group
d) alarm and history group
View Answer

Answer: b
Explanation: The application layer functions are grouped into two groups, the application-layer host group and the application layer matrix group. They both calculate traffic by protocol units and use their respective control tables in the network-layer host group and the network-layer matrix group. The application-layer matrix group can also generate a report of the top N protocol conversations.

9. The ATM RMON MIB is under the experimental node of the _____ lnternet MIB.
a) IETF
b) ISO
c) ITU
d) IEEE
View Answer

Answer: a
Explanation: There are four different collection perspectives that are possible for ATM RMON. The ATM RMON MIB is under the experimental node of the IETF lnternet MIB.

10. In RMON1 Ethernet groups, what are the Statistics group?
a) It contains information about the hosts on the network
b) It contains statistics measured by the probe for each monitored Ethernet interface on a device
c) It is a periodic statistical sampling of data from various types of networks
d) It periodically takes statistical samples on specified variables in the probe and compares them with the pre-configured threshold stored in the probe
View Answer

Answer: b
Explanation: There are nine RMON1 common and Ethernet groups. The statistics group contains statistics measured by the probe for each monitored Ethernet interface on a device. The etherStatsTable in this group has an entry for each interface. Data include statistics on packet types, size, and errors. It also provides the capability to gather statistics on the collision of the Ethernet segment.

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