Answer / guest

Answer: D

IEEE 8021.d Spanning Tree Protocol (STP) was developed to
prevent

routing loops in a network. If a router, switch, or hub has
more then

one path to the same destination, a routing problem could
occur. To

prevent this, the Spanning Tree Protocol is executed between
the devices

to detect and logically block redundant paths from the
network. The main

function of the Spanning Tree Protocol is to allow redundant
network

paths without suffering the effects of loops in the network.

The Spanning Tree Algorithm (STA) implemented by STP
prevents loops by

calculating a stable Spanning Tree network topology. When
creating fault

tolerant internetworks, a loop-free path must exist between
all Ethernet

nodes in the network. Spanning Tree frames called Bridge
Protocol Data

Units (BPDUs) are sent and received by all switches in the
network at

regular intervals.

Identify the default values that make up IGRP's composite metric? A.) Bandwidth B.) Load C.) Reliability D.) MTU E.) Delay

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Which of the following is a characteristic of a switch, but not of a repeater? A.) Switches forward packets based on the IPX or IP address in the frame B.) Switches forward packets based on the IP address in the frame C.) Switches forward packets based on the MAC address in the frame D.) Switches forward packets based only on the IP address in the packet

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How many ports are present in a router?

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What is the purpose and default value of the CDP timer command? A.) 90 seconds; interval before an entry expires B.) 60 seconds; interval between updates C.) 60 seconds; interval before an entry expires D.) 90 seconds; interval between updates

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The Datalink Layer is broken down into 2 layers, LLC and MAC. The LLC establishes media independence and what else? A.) Provides Windowing. B.) Provides flow control. C.) Provides SAP's (Service Access Points). D.) The Datalink layer does not have sublayers. E.) Provides SAP's (Service Advertising Protocol). F.) RIP Updates.

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Which of the following are solutions to the problems encountered with Distance-Vector routing? A.) Defining a Maximum B.) Poison Reverse C.) Triggered Updates D.) Shortest path first algorithm. E.) Split Horizon

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How many ways to access router?

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Why we are not using subnet mask of class A in class C?before answering this question, just think upon if we do this then we don't need to move to IPv6.

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"sap" is used by the Cisco IOS for which encapsulation types? A. Ethernet_802.2 B. Token-Ring C. FDDI_SNAP D. Ethernet_802.3 E. FDDI_802.2

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Which OSI Reference Layer controls end-to-end (host to host) communication? A.) Transport B.) Physical C.) Datalink D.) Network E.) Session

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Which three devices can be used to convert the user data from the DTE into a form acceptable to the WAN service's facility? A. Modem B. CSU/DSU C. TA/NT1 D. CO E. SS7

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Choose the following that are benefits to segmenting with router: A.) Flow Control B.) Manageability C.) Multiple Active Paths D.) Explicit packet lifetime control

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