CCNA

Instructions:

• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is an Autonomous System?
Null
Select the routing protocol - then specify the network.
Layers 1 & 2
...


2. The AS number must what?
A layer 3 switch or router
A group of end stations with a common set of requirements - independent of their physical location
View
Match on all routers or it will not work


3. What is the spilt horizon rule?
Dijkstra's Algorithm
DROTHER
It is never useful to send information about a route back in the direction from which the original info came.
Distance Vector


4. What three types of IPv6 address types are there?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Every 10 Seconds
Unicast - Multicast - Anycast


5. What is prefix length?
Between areas?
Data Link Connection Identifier
Aka Subnet mask
Each router builds a map of the network and determines the shortest path to every network.


6. What is the default load balancing for RIP
16
224.0.0.10
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
4


7. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
IETF
4
Bandwidth & Delay


8. An autonomous system could also be referred to as what?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Domain
TRUE
Adjacency


9. How often are BPDU's sent?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Unspecified
Ever 2 seconds


10. Describe a Inbound ACL
Unicast - Multicast - Anycast
Select the routing protocol - then specify the network.
Packets are processed before they are routed to an outbound interface.
224.0.0.5


11. What Layer does Frame Relay operate at?
Not scalable - hard to maintain as the network grows
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Layers 1 & 2
Inter-VLAN routing


12. What are two OSPF authentication methods?
Plaintext and MD5
DROTHER
Packet Header
The Diffusing Update Algorithm (DUAL)


13. How does a Standard ACL work?
R= Rip protocol; You can reach network 192.168.1.0 in two hops. The 120 is the admin distance and the 2 is the metric (hop). and it can be reached via the 10.1.1.2 network.
A combination of Link-state and distance vector
Checks the source address and then permits or denies the entire protocol suite
Between areas?


14. What is a VLAN
4
Loopback
A combination of Link-state and distance vector
A group of end stations with a common set of requirements - independent of their physical location


15. What two parameters does EIGRP use to determine the best route?
Every 30 Seconds
Ever 2 seconds
90
Advertised Distance & Feasible distance


16. What are subinterfaces?
2^n-2
Multiple virtual interfaces that are associated with one physical interface
It is never useful to send information about a route back in the direction from which the original info came.
Loopback


17. What type of algorithm does EIGRP use?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Make sure trunking is established. Ensure that dot1q encapsulation is set - and then for each subinterface do this encapsulation dot1Q 2 where 2 is the VLAN associated with that interface
Advance Distance Vector
A trunk


18. What is the multicast address for EIGRP?
224.0.0.5
The update only includes info about the route change
Plaintext and MD5
224.0.0.10


19. Explain how routing loops occur with RIP?
Disable auto summarization
...
4 times the hello interval
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


20. What does the back bone router do?
120
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Every 30 minutes by default
Connects the different areas


21. VTP Server Mode does what?

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22. Formula for determining hosts
Individual or group IP's
Checks the source and destination address then permits or denies specific protocols
RIPv2 and EIGRP
2^n-2


23. Static VLAN is what?
Port based
Packets are processed before they are routed to an outbound interface.
Plaintext and MD5
Associating the network address with a local DLCI.


24. Classful Protocols summarize
Automatically
0
1Gb/s
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


25. Spanning-Tree cost of 19
100Mb/s
Only with Cisco IOS software release 12.3 (2) T
Packets are processed before they are routed to an outbound interface.
The lower MAC address


26. How do you configure OSPF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
For line vty 0 4
100Mb/s
0


27. Summarization of network information usually occurs where?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
It combines the advantages of Link-State and Distance vector routing protocols.
Only topology within their respective area.
Between areas?


28. Advance Distance Vector or Hybrid uses what?
A combination of Link-state and distance vector
Every 30 minutes by default
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Checks the source and destination address then permits or denies specific protocols


29. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
0
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Not scalable - hard to maintain as the network grows
View


30. Max_age time for BPDU's

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31. Normal time for STP convergence
Link-State
30-50 seconds
Area Border Router
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


32. In frame relay What is Inverse Arp
Associating the network address with a local DLCI.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Plaintext and MD5
Domain


33. How are Frame Relay Circuits identified?

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34. How does inbound ACL work?
The inverse of a subnet mask.
Every 10 seconds
4
Test Firsts/ Routes Second


35. What do area's do?
Reduce the link-state database and routing table
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
R= Rip protocol; You can reach network 192.168.1.0 in two hops. The 120 is the admin distance and the 2 is the metric (hop). and it can be reached via the 10.1.1.2 network.
Automatically


36. What is the dead interval
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
The inverse of a subnet mask.
Null
One ACL per protocol - One ACL per direction - Once ACL per interface


37. With OSPF - what must be defined?
90
A combination of Link-state and distance vector
Match on all routers or it will not work
A backbone area...Also known as Area 0


38. VTP Client Mode does what?

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39. Purpose of a Routing Protocol?
10Mb/s
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
All backup routes for destinations.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


40. In regards to ACL's What are the three protocols?
1Gb/s
MD5 and you have to enable it if you want to use it.
One ACL per protocol - One ACL per direction - Once ACL per interface
Susceptible to routing loops


41. Spanning-Tree coast of 4
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
1Gb/s
Packets are processed before they are routed to an outbound interface.
Domain


42. OSPF will elect a what?
It combines the advantages of Link-State and Distance vector routing protocols.
Inter-VLAN routing
Designated Router (DR) and a Back-up designated Router (BDR)
The inverse of a subnet mask.


43. The advantages of VLSM
Maximizing address efficiency - organization - summarization
...
MD5 and you have to enable it if you want to use it.
Area Border Router


44. Routing protocol is what?
Updates all DROTHER Routers when a change occurs
A protocol on how to communicate with other routers
20 seconds: 10 missed BPDU's
Convergence


45. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
To reduce OSPF traffic
MD5 and you have to enable it if you want to use it.
Telnet connectivity - authentication and extended ACLs
16


46. Admin distance of OSPF?
Forces protocols to behave as if they were classless
110
RIPv2 and EIGRP
The update only includes info about the route change


47. What is the Shortest Path First algorithm also called?

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48. What are the three LMI standards
Cisco - ANSI - Q.933A
Carry's traffic for multiple VLANS
90
No


49. What are the major components of OSPF troubleshooting?
MAC based
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
4
IP


50. By default OSPF uses what type of authentication?
Null
The Diffusing Update Algorithm (DUAL)
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Determines the cost which is the bandwidth