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 are the two ways routers can learn about the destination information?
0
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Match on all routers or it will not work
A trunk


2. In Link state terminology - What is a link?

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3. How often are LMI's sent out?
Forces protocols to behave as if they were classless
Cisco - ANSI - Q.933A
Layers 1 & 2
Every 10 Seconds


4. What is prefix length?
Aka Subnet mask
No
Susceptible to routing loops
1


5. Can a Router exchange routing information if they are using different Routing Protocols?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
No
To reduce OSPF traffic
Automatically


6. What three types of IPv6 address types are there?
A protocol on how to communicate with other routers
Unicast - Multicast - Anycast
0
The update only includes info about the route change


7. What does a trunk do?

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8. OSPF will elect a what?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Designated Router (DR) and a Back-up designated Router (BDR)
Each router builds a map of the network and determines the shortest path to every network.
2^n


9. What does the back bone router do?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
IETF
Connects the different areas
Dijkstra's Algorithm


10. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A permit statement
TRUE


11. Why is this done?
20 seconds: 10 missed BPDU's
10Mb/s
To reduce OSPF traffic
1.) Enter the Routing Manually 2.) Use Dymamic Routing


12. When do you use Access-Class
4
A group of end stations with a common set of requirements - independent of their physical location
4 times the hello interval
For line vty 0 4


13. Normal time for STP convergence
Forces protocols to behave as if they were classless
TRUE
30-50 seconds
Match on all routers or it will not work


14. What two parameters does EIGRP use to determine the best route?
Adjacency
Determines the cost which is the bandwidth
For line vty 0 4
Advertised Distance & Feasible distance


15. What is the default Bridge priority?
The inverse of a subnet mask.
32768
MAC based
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


16. What two things need to be done to enable dynamic routing?
Every 10 seconds
A link is an interface on a router
Select the routing protocol - then specify the network.
View


17. What do you need to do if there are discontigous networks with EIGRP?
100Mb/s
Different Autonomous Systems
Every 30 minutes by default
Disable auto summarization


18. Admin distance of a connected Network?
0
Every 30 minutes by default
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


19. For a VLAN to span across multiple switches What is required?
The Root bridge is the bridge with the lowest bridge ID
Layers 1 & 2
A trunk
Carry's traffic for multiple VLANS


20. What does the DR do?
Updates all DROTHER Routers when a change occurs
Multiple virtual interfaces that are associated with one physical interface
2^n-2
Six equal cost paths


21. What type of algorithm does OSPF & IS-IS use?
110
Individual or group IP's
Link-State
Private: link local


22. For an adjacency to occur what do the routers have to agree on?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
90
Unicast - Multicast - Anycast
The Root bridge is the bridge with the lowest bridge ID


23. Purpose of a Routing Protocol?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
It is the signaling standard that maintains connection and statues between the DCE and DTE
Advertised Distance & Feasible distance
EIGRP - OSPF - RIP


24. Summarization of network information usually occurs where?
Between areas?
Match on all routers or it will not work
Adjacency
DROTHER


25. Admin distance of EIGRP?
Match on all routers or it will not work
90
The inverse of a subnet mask.
To select the best path to the destination


26. OSPF routes packets within a single?
Autonomous System
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.
Test Firsts/ Routes Second
It is never useful to send information about a route back in the direction from which the original info came.


27. What is needed to pass traffic from one VLAN to another?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Every 10 Seconds
A layer 3 switch or router
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs


28. How do you apply the ACL to an interface
A protocol on how to communicate with other routers
Reduce the link-state database and routing table
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


29. An autonomous system could also be referred to as what?
Every 30 minutes by default
Domain
Scalable and fast convergence
...


30. How often are BPDU's sent?
Only topology within their respective area.
A combination of Link-state and distance vector
Reduce the link-state database and routing table
Ever 2 seconds


31. How often does a router send link-state advertisements?
Every 30 minutes by default
The inverse of a subnet mask.
Layers 1 & 2
Different Autonomous Systems


32. How is an EUI-64 format interface ID created from a 48-Bit MAC address
A layer 3 switch or router
A trunk
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
...


33. What are subinterfaces?
Every 5 seconds
Multiple virtual interfaces that are associated with one physical interface
100Mb/s
120


34. What algorithm does EIGRP use?
The Diffusing Update Algorithm (DUAL)
0
Every 30 minutes by default
4 times the hello interval


35. Describe features of RIPv1
Unicast - Multicast - Anycast
Between areas?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
IETF


36. What is an ABR
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Area Border Router
RIPv2 and EIGRP
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


37. Explain how routing loops occur with RIP?
15.....16 hops and the interface is down
...
Every 10 Seconds
The update only includes info about the route change


38. What is the purpose of LMI
Port based
Between areas?
Convergence
It is the signaling standard that maintains connection and statues between the DCE and DTE


39. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
90
The lower MAC address
IETF
View


40. Dynamic VLAN is what?
MAC based
10Mb/s
Maximizing address efficiency - organization - summarization
Unspecified


41. How does an Extended ACL work?
15.....16 hops and the interface is down
Checks the source and destination address then permits or denies specific protocols
Bandwidth & Delay
No


42. Break down the word Link-State

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43. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
224.0.0.10
2^n
Associating the network address with a local DLCI.


44. Wildcard masks filter

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45. Admin distance of OSPF?
Match on all routers or it will not work
Advance Distance Vector
110
IETF


46. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
The Diffusing Update Algorithm (DUAL)
Unicast - Multicast - Anycast
TRUE


47. In frame relay What is Inverse Arp
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Associating the network address with a local DLCI.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
EIGRP - OSPF - RIP


48. VTP Client Mode does what?

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49. What two classless protocols act classful by default?
A protocol on how to communicate with other routers
Area Border Router
Every 30 minutes by default
RIPv2 & EIGRP


50. Formula for determining Subnets
2^n
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Aka Subnet mask
15.....16 hops and the interface is down