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26 Cards in this Set
- Front
- Back
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Which frame-tagging method adds 30 bytes of information to the original frame?
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Cisco proprietary method, ISL, adds a new 24-byte header and a new 4-byte trailer
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What is VTP pruning?
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A setting which allows switches to send broadcasts to trunk links that actually mut have that information.
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How do you create a default route?
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By using all 0s in place of the destination network and subnet mask
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Which command can you use to see which devices have telnetted into your router?
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Show users
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What does IP RIP use to find the best path to a remote network?
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hop count
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If your Frame Relay network is congested, what mechanism is used to tell the source device to slow down?
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Backward Explicit Congestion Notification (BECN) is used to send information back to an originating router telling it to slow down its transfer rate because the switch is congested.
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A port in the STP ___________________ state populates the MAC address table but doesn’t forward data frames.
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Learning
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A port in the STP ___________________ state listents to BPDU to make sure no loops occur on the network before passing data frames. It prepares to forward data frames without populating the MAC table.
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Listening
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What does a switch do with an unknown unicast frame received on an interface?
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Floods the network with the frame
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There’s a macro for each of the devices under Smartports configured via the CNA of the 2960 or 3560 switches. Which of the following command will you type in to see these macros?
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Show parser macro
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What is Inverse ARP used for?
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Reslove an IP address to a local DLCI number
If a router does not support IARP or is used on the network, a frame-relay map must be configured for each PVC |
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Does it matter if new VTP server has a higher revision number than an old VTP server?
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Yes, the old one should be higher
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You're configuring a router to act as a hub within a Frame-relay hub-and-spoke topology. Why would you opt for using point-to-point subinterfaces instead of a multipoint interface?
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It avoids split horizon issues with distance vector routing protocols
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Does an access list filter traffic that originates from a router?
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No
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What is an LSA and how is it used?
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Link-state advertisement (LSA) packets are used by a router running link-state prtocol allong with hello packets. LSA packets exchange topoloy information and updates when changes occur.
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Which kinds of elections use MAC and IP addresses, and how are they one?
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MAC, lowest mac wins
IP in DR or BDR election, highest IP wins |
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What is a loopback interface used for?
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Loopback interfaces are virtual router interfaces Cisco recommends you use whenever you configure OSPF on a router to "rig" a DR or BDR election
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What is DR and BDR?
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OSPF uses elections to designate a "Designated Router" DR and "Backup Designated Router" BDR
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What does a successful dial session mean?
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Physical layer is good
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Does OSPF use a network mask or a wildcard mask?
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Wildcard
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In the "R1#show frame-relay map" command, what would the word "dynamic" indicate?
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IP address was dynamically mapped by IARP to your local DLCI. By default, IARP is enabled
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If you are trying to reconfigure a Catalyst 2950 by getting rid of all of your current configurations, what two places must you erase?
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Erase startup config and delete the VLAN database that is stored in flash
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What ip address does OSPF use to send hello packets to adjecent neighbors?
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224.0.0.5
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What are the three possible trunking modes for a switch port?
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On, which it is configured as "always" a trunk port and attempts to make the far end of the sement a trunk port too using DTP
Desirable, will try to be a trunk port but will be access if the other end refuses auto, which will become a trunk port if DTP invites it but will not send DTP frames to change other port |
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What are the AD, metric, and update periord of RIP and IGRP?
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RIP: 120, hop count, full route table 30 seconds
IGRP 100, bandwidth and delay of line, full route table 90 seconds |
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What is BGP?
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Border gateway protocol, an exterior gateway protocol, outside CCNA scope
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