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. How often are periodic updates sent out via RIP
Plaintext and MD5
Every 30 Seconds
It is the signaling standard that maintains connection and statues between the DCE and DTE
Determines the cost which is the bandwidth

2. How do you configure OSPF
Reduce the link-state database and routing table
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
IETF
Every 10 seconds

3. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Private: link local
Every 5 seconds
The lower MAC address
Layers 1 & 2

4. Describe an Outbound ACL
224.0.0.5
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The lower MAC address
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

5. Why is EIGRP considered a Hybrid routing protocol?
Different Autonomous Systems
Select the routing protocol - then specify the network.
32768
It combines the advantages of Link-State and Distance vector routing protocols.

6. Why is it important to have a loopback address when using OSPF?
Adjacency
IP
90
Because a loopback interface is always active and cannot be in a down state like a real interface can.

7. Advance Distance Vector or Hybrid uses what?
The information regarding that link. This can include the router's IP address - the type of network - the cost of the link - and if there are any neighboring routers on that link.
TRUE
A combination of Link-state and distance vector
Loopback

8. How does inbound ACL work?
The Diffusing Update Algorithm (DUAL)
Test Firsts/ Routes Second
Designated Router (DR) and a Back-up designated Router (BDR)
Inter-VLAN routing

9. 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.
A group of end stations with a common set of requirements - independent of their physical location
To select the best path to the destination
Bandwidth & Delay

10. What three types of IPv6 address types are there?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
1
The Root bridge is the bridge with the lowest bridge ID
Unicast - Multicast - Anycast

11. Purpose of a Routing Protocol?
All backup routes for destinations.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Convergence

12. What is prefix length?
1
Aka Subnet mask
Layers 1 & 2
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.

13. How often does EIGRP send hellow packets?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Every 5 seconds
Only with Cisco IOS software release 12.3 (2) T
To select the best path to the destination

14. What does bounded refer to?
Port based
Dijkstra's Algorithm
IP
Propagation of partial updates that are sent only to those routers that the changes affect.

15. Explain OSPF

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16. Admin distance of a connected Network?
One ACL per protocol - One ACL per direction - Once ACL per interface
0
Make sure you are in interface mode - then use this command ip access-group 1 out/in
A protocol on how to communicate with other routers

17. How do you configure a sub interface?
A permit statement
Make sure you are in interface mode - then use this command ip access-group 1 out/in
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
0

18. Example of a Routing Protocol?
EIGRP - OSPF - RIP
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
It is never useful to send information about a route back in the direction from which the original info came.
Determines the cost which is the bandwidth

19. How often are OSPF hello packets sent out?
Layers 1 & 2
A backbone area...Also known as Area 0
The update only includes info about the route change
Every 10 seconds

20. What are two statements that are true of IPv6 address representation?
IETF
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
For line vty 0 4
A protocol on how to communicate with other routers

21. What is ::
Updates all DROTHER Routers when a change occurs
RIPv2 and EIGRP
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Unspecified

22. Routers are used for what?
90
To select the best path to the destination
Test Firsts/ Routes Second
All backup routes for destinations.

23. What is the default load balancing for RIP
4
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Loopback

24. Wildcard masks filter

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25. By default OSPF uses what type of authentication?
Null
Convergence
Susceptible to routing loops
Dijkstra's Algorithm

26. Admin distance of OSPF?
Checks the source and destination address then permits or denies specific protocols
110
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Reduce the link-state database and routing table

27. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
It combines the advantages of Link-State and Distance vector routing protocols.
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Between areas?
16

28. The advantages of VLSM
Maximizing address efficiency - organization - summarization
RIPv2 and EIGRP
The update only includes info about the route change
Advertised Distance & Feasible distance

29. What is one to nearest
Anycast
A protocol on how to communicate with other routers
A permit statement
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available

30. How does a Standard ACL work?
By DLCI's
1
Checks the source address and then permits or denies the entire protocol suite
Port based

31. Normal time for STP convergence
Different Autonomous Systems
30-50 seconds
4
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

32. What does partial refer to?
The inverse of a subnet mask.
224.0.0.5
The update only includes info about the route change
0

33. What is passing VLAN traffic to another called?
Inter-VLAN routing
A protocol on how to communicate with other routers
1
...

34. In regards to ACL's What are the three protocols?
Packets are processed before they are routed to an outbound interface.
Adjacency
One ACL per protocol - One ACL per direction - Once ACL per interface
20 seconds: 10 missed BPDU's

35. Admin distance of a Static Route?
Propagation of partial updates that are sent only to those routers that the changes affect.
2^n-2
Bandwidth & Delay
1

36. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Only with Cisco IOS software release 12.3 (2) T
A group of end stations with a common set of requirements - independent of their physical location
By DLCI's

37. Why is this done?
To reduce OSPF traffic
Reduce the link-state database and routing table
The information regarding that link. This can include the router's IP address - the type of network - the cost of the link - and if there are any neighboring routers on that link.
Only topology within their respective area.

38. What do area's do?
The information regarding that link. This can include the router's IP address - the type of network - the cost of the link - and if there are any neighboring routers on that link.
90
Reduce the link-state database and routing table
The lower MAC address

39. Explain how routing loops occur with RIP?
...
Routes First/ Tests second
15.....16 hops and the interface is down
Unicast - Multicast - Anycast

40. What is Frame Relay?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Disable auto summarization
Only topology within their respective area.
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

41. An autonomous system could also be referred to as what?
Null
Cisco - ANSI - Q.933A
Domain
IETF

42. When do you use Access-Class
Determines the cost which is the bandwidth
Telnet connectivity - authentication and extended ACLs
For line vty 0 4
IETF

43. OSPF will elect a what?
Designated Router (DR) and a Back-up designated Router (BDR)
...
30-50 seconds
Plaintext and MD5

44. What distant vector protocols exhibit classless behavior?
A layer 3 switch or router
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
RIPv2 and EIGRP
110

45. Rip is capable of load balancing over as many as?
0
Six equal cost paths
4 times the hello interval
Supports both unequal metric load balancing and equal metric balancing.

46. How does an outbound 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.
Adjacency
Checks the source and destination address then permits or denies specific protocols
Routes First/ Tests second

47. What does the back bone router do?
Determines the cost which is the bandwidth
110
4 times the hello interval
Connects the different areas

48. What does DLCI stand for?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Plaintext and MD5
Data Link Connection Identifier
RIPv2 and EIGRP

49. Can you delete individual entries in a specific ACL?
Bandwidth & Delay
Packets are processed before they are routed to an outbound interface.
Only with Cisco IOS software release 12.3 (2) T
For line vty 0 4

50. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Packet Header
The lower MAC address
Individual or group IP's
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address