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. Describe features of RIPv1
90
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
30-50 seconds
A link is an interface on a router


2. What does EIGRP use to calculate it's metric?
For line vty 0 4
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
TRUE
Bandwidth & Delay


3. Formula for determining Subnets
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
2^n
Only with Cisco IOS software release 12.3 (2) T
Propagation of partial updates that are sent only to those routers that the changes affect.


4. With OSPF - what must be defined?
Supports both unequal metric load balancing and equal metric balancing.
TRUE
One ACL per protocol - One ACL per direction - Once ACL per interface
A backbone area...Also known as Area 0


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

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6. Admin distance of a connected Network?
0
A protocol on how to communicate with other routers
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
A combination of Link-state and distance vector


7. What are non designated routers called?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
DROTHER
Individual or group IP's
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


8. How often are BPDU's sent?
Every 30 Seconds
TRUE
Ever 2 seconds
Carry's traffic for multiple VLANS


9. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
View
32768
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.
Unicast - Multicast - Anycast


10. What Layer does Frame Relay operate at?
Layers 1 & 2
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Not scalable - hard to maintain as the network grows
For line vty 0 4


11. Example of a Routed Protocol?
View
120
Bandwidth & Delay
IP


12. What is the default for equal cost paths for load balancing with OSPF?
4
A link is an interface on a router
Every 5 seconds
Plaintext and MD5


13. In Link state terminology - What is a link?
Six equal cost paths
A link is an interface on a router
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Disable auto summarization


14. Every ACL will need what?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Distance Vector
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
A permit statement


15. What is the dead interval
Updates all DROTHER Routers when a change occurs
View
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
4


16. VTP Server Mode does what?

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17. Admin distance of EIGRP?
TRUE
A combination of Link-state and distance vector
Propagation of partial updates that are sent only to those routers that the changes affect.
90


18. How does the SPF determine the shortest path?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
10Mb/s
Determines the cost which is the bandwidth
Disable auto summarization


19. How is the root bridge determined?
For line vty 0 4
The update only includes info about the route change
The Root bridge is the bridge with the lowest bridge ID
Ever 2 seconds


20. Spanning-Tree coast of 4
It is the signaling standard that maintains connection and statues between the DCE and DTE
Scalable and fast convergence
1Gb/s
Six equal cost paths


21. How often does EIGRP send hellow packets?
Every 30 Seconds
Each router builds a map of the network and determines the shortest path to every network.
2^n
Every 5 seconds


22. Who designed OSPF?
IETF
4
A backbone area...Also known as Area 0
Plaintext and MD5


23. How does an Extended ACL work?
Checks the source and destination address then permits or denies specific protocols
224.0.0.5
224.0.0.10
Multicast


24. Why is it important to have a loopback address when using OSPF?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The Root bridge is the bridge with the lowest bridge ID
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.


25. How often does a router send link-state advertisements?
TRUE
Individual or group IP's
Every 30 minutes by default
MD5 and you have to enable it if you want to use it.


26. What is Frame Relay?
Automatically
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
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
Susceptible to routing loops


27. What are the two ways routers can learn about the destination information?
Forces protocols to behave as if they were classless
Telnet connectivity - authentication and extended ACLs
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


28. Admin distance of OSPF?
It is the signaling standard that maintains connection and statues between the DCE and DTE
4
Inter-VLAN routing
110


29. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
Select the routing protocol - then specify the network.
TRUE
Advertised Distance & Feasible distance
A link is an interface on a router


30. Explain how routing loops occur with RIP?
One ACL per protocol - One ACL per direction - Once ACL per interface
...
Only topology within their respective area.
30-50 seconds


31. How many hops are allowed with RIP?
0
Only with Cisco IOS software release 12.3 (2) T
15.....16 hops and the interface is down
Test Firsts/ Routes Second


32. A router running EIGRP will store what?
The inverse of a subnet mask.
Susceptible to routing loops
All backup routes for destinations.
1.) Enter the Routing Manually 2.) Use Dymamic Routing


33. What is the Wildcard mask
Propagation of partial updates that are sent only to those routers that the changes affect.
It is never useful to send information about a route back in the direction from which the original info came.
The inverse of a subnet mask.
Plaintext and MD5


34. What is the multicast address for EIGRP?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
DROTHER
224.0.0.10
Advance Distance Vector


35. Problem with static routes
Not scalable - hard to maintain as the network grows
1Gb/s
It combines the advantages of Link-State and Distance vector routing protocols.
Plaintext and MD5


36. Advance Distance Vector or Hybrid uses what?
Dijkstra's Algorithm
Unicast - Multicast - Anycast
A combination of Link-state and distance vector
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


37. Explain OSPF

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38. What is prefix length?
Match on all routers or it will not work
Aka Subnet mask
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


39. Static VLAN is what?
20 seconds: 10 missed BPDU's
...
The lower MAC address
Port based


40. What type of algorithm does EIGRP use?
To select the best path to the destination
Advance Distance Vector
Susceptible to routing loops
Packets are processed before they are routed to an outbound interface.


41. OSPF will elect a what?
RIPv2 & EIGRP
A trunk
Aka Subnet mask
Designated Router (DR) and a Back-up designated Router (BDR)


42. Routers are used for what?
Multicast
To select the best path to the destination
Layers 1 & 2
Not scalable - hard to maintain as the network grows


43. What type of authentication does EIGRP use?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
224.0.0.5
MD5 and you have to enable it if you want to use it.
Layers 1 & 2


44. Can you delete individual entries in a specific ACL?
Telnet connectivity - authentication and extended ACLs
Aka Subnet mask
Only with Cisco IOS software release 12.3 (2) T
Link-State


45. Normal time for STP convergence
It is never useful to send information about a route back in the direction from which the original info came.
Bandwidth & Delay
Loopback
30-50 seconds


46. Break down the word Link-State

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47. What two parameters does EIGRP use to determine the best route?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Advertised Distance & Feasible distance
224.0.0.5


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

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49. In regards to troubleshooting OSPF what should you check?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
No
Propagation of partial updates that are sent only to those routers that the changes affect.


50. What two classless protocols act classful by default?
RIPv2 & EIGRP
90
...
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL