Test your basic knowledge |

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 the spilt horizon rule?
It is never useful to send information about a route back in the direction from which the original info came.
IETF
Only topology within their respective area.
Dijkstra's Algorithm

2. Normal time for STP convergence
Supports both unequal metric load balancing and equal metric balancing.
30-50 seconds
Telnet connectivity - authentication and extended ACLs
Domain

3. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
16
The Diffusing Update Algorithm (DUAL)
Carry's traffic for multiple VLANS

4. What does a trunk do?

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5. What type of algorithm does OSPF & IS-IS use?
1Gb/s
To reduce OSPF traffic
Link-State
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

6. What are two statements that are true of IPv6 address representation?
No
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
RIPv2 & EIGRP
Different Autonomous Systems

7. How do you configure OSPF
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Updates all DROTHER Routers when a change occurs
110

8. With OSPF - what must be defined?
16
4 times the hello interval
A backbone area...Also known as Area 0
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

9. A router running EIGRP will store what?
All backup routes for destinations.
Not scalable - hard to maintain as the network grows
Plaintext and MD5
It is the signaling standard that maintains connection and statues between the DCE and DTE

10. How many hops are allowed with RIP?
...
4
View
15.....16 hops and the interface is down

11. Purpose of a Routing Protocol?
Automatically
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Every 10 Seconds
Packets are processed before they are routed to an outbound interface.

12. How does inbound 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.
RIPv2 & EIGRP
Test Firsts/ Routes Second
Automatically

13. What is the purpose of LMI
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
It is the signaling standard that maintains connection and statues between the DCE and DTE
Inter-VLAN routing
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

14. What is one to nearest
A backbone area...Also known as Area 0
Anycast
Susceptible to routing loops
32768

15. What two things need to be done to enable dynamic routing?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Multicast
Select the routing protocol - then specify the network.
Port based

16. What is OSPF multicast address?
30-50 seconds
224.0.0.5
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Anycast

17. Describe a Inbound ACL
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.
Packets are processed before they are routed to an outbound interface.
Determines the cost which is the bandwidth
1.) Enter the Routing Manually 2.) Use Dymamic Routing

18. Dynamic VLAN is what?
Advance Distance Vector
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
MAC based
224.0.0.10

19. How often does EIGRP send hellow packets?
Designated Router (DR) and a Back-up designated Router (BDR)
2^n-2
Private: link local
Every 5 seconds

20. What do you need to do if there are discontigous networks with EIGRP?
Unicast - Multicast - Anycast
Connects the different areas
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Disable auto summarization

21. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Adjacency
Bandwidth & Delay
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

22. The time delay for a router to match a network change?
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.
Match on all routers or it will not work
Convergence

23. Spanning-Tree coast of 4
Not scalable - hard to maintain as the network grows
Layers 1 & 2
1Gb/s
IP

24. What is an Autonomous System?
10Mb/s
...
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Supports both unequal metric load balancing and equal metric balancing.

25. Exterior Gateway Protocols are designed for use between
Loopback
A permit statement
Dijkstra's Algorithm
Different Autonomous Systems

26. In frame relay What is Inverse Arp
Associating the network address with a local DLCI.
A link is an interface on a router
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
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

27. What is prefix length?
Aka Subnet mask
MD5 and you have to enable it if you want to use it.
Carry's traffic for multiple VLANS
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

28. Example of a Routing Protocol?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Maximizing address efficiency - organization - summarization
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
EIGRP - OSPF - RIP

29. With OSPF - there must always be a area......
DROTHER
0
Routes First/ Tests second
Port based

30. What are subinterfaces?
Distance Vector
90
Domain
Multiple virtual interfaces that are associated with one physical interface

31. What does the DR do?
Only with Cisco IOS software release 12.3 (2) T
Updates all DROTHER Routers when a change occurs
A link is an interface on a router
The inverse of a subnet mask.

32. What is the default Bridge priority?
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.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
32768

33. Admin distance of a Static Route?
Advertised Distance & Feasible distance
1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A group of end stations with a common set of requirements - independent of their physical location

34. What is the default for equal cost paths for load balancing with OSPF?
Anycast
...
4
TRUE

35. How is the root bridge determined?
The Root bridge is the bridge with the lowest bridge ID
16
...
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs

36. What type of authentication does EIGRP use?
Distance Vector
0
MD5 and you have to enable it if you want to use it.
A backbone area...Also known as Area 0

37. Explain OSPF

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38. How does an Extended ACL work?
Bandwidth & Delay
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Null
Checks the source and destination address then permits or denies specific protocols

39. OSPF routes packets within a single?
View
MD5 and you have to enable it if you want to use it.
Autonomous System
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

40. What is the default load balancing for RIP
Anycast
4
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
RIPv2 and EIGRP

41. How long is the dead interval
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
4 times the hello interval
...
Susceptible to routing loops

42. How often are BPDU's sent?
It is never useful to send information about a route back in the direction from which the original info came.
DROTHER
Ever 2 seconds
4

43. Problem with static routes
Checks the source and destination address then permits or denies specific protocols
Not scalable - hard to maintain as the network grows
4
RIPv2 and EIGRP

44. Who designed OSPF?
IETF
A trunk
4
Anycast

45. Problem with RIP
Every 10 seconds
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Susceptible to routing loops
Only topology within their respective area.

46. What does EIGRP use to calculate it's metric?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Bandwidth & Delay
Not scalable - hard to maintain as the network grows
Unspecified

47. What type of algorithm does EIGRP use?
Advance Distance Vector
...
Link-State
Telnet connectivity - authentication and extended ACLs

48. How often does a router send link-state advertisements?
110
Every 30 minutes by default
No
All backup routes for destinations.

49. What are two OSPF authentication methods?
Plaintext and MD5
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Determines the cost which is the bandwidth
Only topology within their respective area.

50. Break down the word Link-State

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