Sawaal
5
Q:

Routers operate at layer _____. LAN switches operate at layer ______. Ethernet hubs operate at layer _____. Word processing operates at layer _______.

A) 3, 3, 1, 7 B) 3, 2, 1, none
C) 3, 2, 1, 7 D) 3, 3, 2, none

Answer:   B) 3, 2, 1, none



Explanation:

Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1. Word processing applications communicate to the Application layer interface, but do not operate at layer 7, so the answer would be none.

Subject: CCNA - CISCO Certification
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Answer & Explanation Answer: A) Layer 1

Explanation:

OSI layer 1 defines the standards for cabling and connectors.

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Mention different memories used in a CISCO router ?

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Different Memories used in a CISCO router are as follows :


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By default , what type of trust are all Windows 2000 trust relationships within a domain tree or forest?

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Answer & Explanation Answer: C) Transitive trust

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By default, all Windows 2000 trusts within a domain tree or forest are transitive trusts.

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What are the typical three different categories of VPNs?

Answer

The following are the different types of VPNs :


PPTP ( Point to Point Tunnel protocol ) VPN : Most commonly used VPN. PPTP is a method for implementing virtual private networks. PPTP uses a control channel over TCP and a GRE tunnel operating to encapsulate PPP packets.


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Intranet-based site-to-site VPN is created between an organization's propriety networks, while extranet-based site-to-site VPN is used for connecting with external partner networks or an intranet.


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What protocol would you use if you were running xDSL and needed authentication?

Answer

PPPoE  or  PPPoA

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Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

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A VPN allows or describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols. A VPN can be set up across any type of link.

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Which of the following is an industry-wide standards suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer3 Network layer of the OSI model?

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How should a router that is being used in a Frame Relay  network be configured to keep split horizon issues from preventing routing updates

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If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.

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