READ Free Dumps For CISCO- 100-105
| Question ID 14421 | How does TCP differ from UDP? (Choose two.)
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| Option A | TCP provides best effort delivery.
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| Option B | TCP provides synchronized communication.
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| Option C | TCP segments are essentially datagrams.
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| Option D | TCP provides sequence numbering of packets.
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| Option E | TCP uses broadcast delivery.
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| Correct Answer | B,D |
Explanation Explanation: Because TCP is a connection-oriented protocol responsible for ensuring the transfer of a datagram from the source to destination machine (end-to-end communications), TCP must receive communications messages from the destination machine to acknowledge receipt of the datagram. The term virtual circuit is usually used to refer to the handshaking that goes on between the two end machines, most of which are simple acknowledgment messages (either confirmation of receipt or a failure code) and datagram sequence numbers. Rather than impose a state within the network to support the connection, TCP uses synchronized state between the two endpoints. This synchronized state is set up as part of an initial connection process, so TCP can be regarded as a connection-oriented protocol. Much of the protocol design is intended to ensure that each local state transition is communicated to, and acknowledged by, the remote party. Reference: http://en.wikibooks.org/wiki/Communication_Networks/TCP_and_UDP_Protocols
| Question ID 14422 | At which layer of the OSI model does the protocol that provides the information that is
displayed by the show cdp neighbors command operate?
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| Option A | application
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| Option B | transport
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| Option C | network
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| Option D | physical
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| Option E | data link
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| Correct Answer | E |
Explanation Explanation: CDP is a device discovery protocol that runs over Layer 2 (the data link layer) on all Cisco- manufactured devices (routers, bridges, access servers, and switches) and allows network management applications to discover Cisco devices that are neighbors of already known devices. With CDP, network management applications can learn the device type and the Simple Network Management Protocol (SNMP) agent address of neighboring devices running lower-layer, transparent protocols. CDP allows devices to share basic configuration information without even configuring any protocol specific information and is enabled by default on all interfaces. CDP is a Datalink Protocol occurring at Layer 2 of the OSI model. CDP is not routable and can only go over to directly connected devices. CDP is enabled, by default, on all Cisco devices. CDP updates are generated as multicasts every 60 seconds with a hold-down period of 180 seconds for a missing neighbor. The no cdp run command globally disables CDP, while the no cdp enable command disables CDP on an interface. Use show cdp neighbors to list out your directly connected Cisco neighboring devices. Adding the detail parameter will display the layer-3 addressing configured on the neighbor. Reference: http://computernetworkingnotes.com/cisco-devices-administration-and- configuration/cisco-discoveryprotocol.html