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 type of algorithm does RIP use?
Distance Vector
Scalable and fast convergence
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
It combines the advantages of Link-State and Distance vector routing protocols.


2. How do you configure OSPF
Link-State
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
MD5 and you have to enable it if you want to use it.


3. In regards to troubleshooting OSPF what should you check?
The inverse of a subnet mask.
A trunk
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Because a loopback interface is always active and cannot be in a down state like a real interface can.


4. How is the root bridge determined?
A trunk
The Root bridge is the bridge with the lowest bridge ID
Associating the network address with a local DLCI.
Every 30 Seconds


5. Formula for determining hosts
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
IP
2^n-2
Every 30 Seconds


6. Example of a Routing Protocol?
Not scalable - hard to maintain as the network grows
2^n
1
EIGRP - OSPF - RIP


7. Break down the word Link-State

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8. What is the purpose of LMI
Port based
Loopback
It is the signaling standard that maintains connection and statues between the DCE and DTE
The Root bridge is the bridge with the lowest bridge ID


9. When placing ACL's in the Network...Do what?

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10. What is the multicast address for EIGRP?
A permit statement
20 seconds: 10 missed BPDU's
224.0.0.10
TRUE


11. Summarization of network information usually occurs where?
Adjacency
Every 5 seconds
Between areas?
The lower MAC address


12. How do you configure a sub interface?
20 seconds: 10 missed BPDU's
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
Loopback
Plaintext and MD5


13. For an adjacency to occur what do the routers have to agree on?
RIPv2 & EIGRP
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
10Mb/s
Telnet connectivity - authentication and extended ACLs


14. What is ::1
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Loopback
Every 10 Seconds
224.0.0.5


15. VTP Server Mode does what?

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16. Admin distance of RIPv2
A combination of Link-state and distance vector
120
Supports both unequal metric load balancing and equal metric balancing.
Make sure you are in interface mode - then use this command ip access-group 1 out/in


17. How does EIGRP work with regards to Load Balancing
All backup routes for destinations.
A link is an interface on a router
Supports both unequal metric load balancing and equal metric balancing.
Area Border Router


18. What is OSPF multicast address?
Multicast
224.0.0.5
90
One ACL per protocol - One ACL per direction - Once ACL per interface


19. What Layer does Frame Relay operate at?
Only topology within their respective area.
Layers 1 & 2
A layer 3 switch or router
Every 5 seconds


20. How does an Extended ACL work?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Every 5 seconds
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Checks the source and destination address then permits or denies specific protocols


21. A router running EIGRP will store what?
One ACL per protocol - One ACL per direction - Once ACL per interface
All backup routes for destinations.
Private: link local
The lower MAC address


22. In regards to ACL's What are the three protocols?
Propagation of partial updates that are sent only to those routers that the changes affect.
Layers 1 & 2
One ACL per protocol - One ACL per direction - Once ACL per interface
0


23. Wildcard masks filter

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24. With ACL's where does the router extract information
Area Border Router
0
Packet Header
It is never useful to send information about a route back in the direction from which the original info came.


25. What is passing VLAN traffic to another called?
Inter-VLAN routing
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Disable auto summarization
Between areas?


26. What is needed to pass traffic from one VLAN to another?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Inter-VLAN routing
A layer 3 switch or router
A permit statement


27. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Loopback
Designated Router (DR) and a Back-up designated Router (BDR)
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.
Connects the different areas


28. Can you delete individual entries in a specific ACL?
Plaintext and MD5
A trunk
All backup routes for destinations.
Only with Cisco IOS software release 12.3 (2) T


29. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Unspecified
1Gb/s
Test Firsts/ Routes Second
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


30. What does the back bone router do?
Every 10 seconds
TRUE
Connects the different areas
A group of end stations with a common set of requirements - independent of their physical location


31. Routing protocol is what?
EIGRP - OSPF - RIP
Different Autonomous Systems
A protocol on how to communicate with other routers
Scalable and fast convergence


32. What are the major components of OSPF troubleshooting?
...
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
A protocol on how to communicate with other routers


33. Max_age time for BPDU's

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34. Admin distance of EIGRP?
Only with Cisco IOS software release 12.3 (2) T
...
90
4


35. By default OSPF uses what type of authentication?
Individual or group IP's
Null
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


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

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37. What are the three LMI standards
TRUE
Only topology within their respective area.
Cisco - ANSI - Q.933A
4


38. An OSPF neighbor relationship can also be called what?
Adjacency
10Mb/s
A protocol on how to communicate with other routers
RIPv2 & EIGRP


39. What does a trunk do?

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40. Purpose of a Routing Protocol?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Packet Header
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Bandwidth & Delay


41. How often are LMI's sent out?
A combination of Link-state and distance vector
Every 10 Seconds
Inter-VLAN routing
Ever 2 seconds


42. What does the DR do?
Advance Distance Vector
No
One ACL per protocol - One ACL per direction - Once ACL per interface
Updates all DROTHER Routers when a change occurs


43. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
To reduce OSPF traffic
224.0.0.5
Packets are processed before they are routed to an outbound interface.


44. What is the spilt horizon rule?
To reduce OSPF traffic
Domain
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
It is never useful to send information about a route back in the direction from which the original info came.


45. What are subinterfaces?
A combination of Link-state and distance vector
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Multicast
Multiple virtual interfaces that are associated with one physical interface


46. Dynamic VLAN is what?
A trunk
Unicast - Multicast - Anycast
MAC based
A group of end stations with a common set of requirements - independent of their physical location


47. What algorithm does EIGRP use?
A group of end stations with a common set of requirements - independent of their physical location
The Diffusing Update Algorithm (DUAL)
View
20 seconds: 10 missed BPDU's


48. Admin distance of a connected Network?
0
Susceptible to routing loops
Determines the cost which is the bandwidth
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.


49. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
Every 10 Seconds
TRUE
Every 30 minutes by default
Advance Distance Vector


50. Can a Router exchange routing information if they are using different Routing Protocols?
It combines the advantages of Link-State and Distance vector routing protocols.
No
Adjacency
Autonomous System