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 do you configure a sub interface?
All backup routes for destinations.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
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
20 seconds: 10 missed BPDU's

2. OSPF will elect a what?
1
Designated Router (DR) and a Back-up designated Router (BDR)
Disable auto summarization
224.0.0.10

3. OSPF routes packets within a single?
A backbone area...Also known as Area 0
32768
To select the best path to the destination
Autonomous System

4. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
Every 10 Seconds
Unspecified
Advance Distance Vector

5. What two classless protocols act classful by default?
Telnet connectivity - authentication and extended ACLs
RIPv2 & EIGRP
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
...

6. What type of authentication does EIGRP use?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
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
A layer 3 switch or router
MD5 and you have to enable it if you want to use it.

7. How does inbound ACL work?
Test Firsts/ Routes Second
Every 10 Seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

8. What is a VLAN
Telnet connectivity - authentication and extended ACLs
1.) Enter the Routing Manually 2.) Use Dymamic Routing
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
A group of end stations with a common set of requirements - independent of their physical location

9. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
View
The Root bridge is the bridge with the lowest bridge ID
32768

10. What is ::1
DROTHER
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Loopback
Only topology within their respective area.

11. What is an ABR
Between areas?
Not scalable - hard to maintain as the network grows
Dijkstra's Algorithm
Area Border Router

12. How often are LMI's sent out?
Every 10 Seconds
A permit statement
Inter-VLAN routing
0

13. Benefits of OSPF?
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
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Scalable and fast convergence

14. What is the default Bridge priority?
Forces protocols to behave as if they were classless
32768
30-50 seconds
A combination of Link-state and distance vector

15. Problem with RIP
30-50 seconds
Susceptible to routing loops
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
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.

16. How does an outbound ACL work?
Routes First/ Tests second
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.
Null

17. What is passing VLAN traffic to another called?
Inter-VLAN routing
Forces protocols to behave as if they were classless
Updates all DROTHER Routers when a change occurs
...

18. How long is the dead interval
4 times the hello interval
Different Autonomous Systems
One ACL per protocol - One ACL per direction - Once ACL per interface
It combines the advantages of Link-State and Distance vector routing protocols.

19. Wildcard masks filter

20. How do you apply the ACL to an interface
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Propagation of partial updates that are sent only to those routers that the changes affect.
Unspecified
Advertised Distance & Feasible distance

21. Admin distance of RIPv2
120
Autonomous System
Designated Router (DR) and a Back-up designated Router (BDR)
Determines the cost which is the bandwidth

22. What do area's do?
2^n-2
Autonomous System
Reduce the link-state database and routing table
Updates all DROTHER Routers when a change occurs

23. What is prefix length?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Every 10 seconds
Aka Subnet mask
Autonomous System

24. What address is FE80:/10
Port based
Dijkstra's Algorithm
Private: link local
Not scalable - hard to maintain as the network grows

25. What is an Autonomous System?
...
Port based
Checks the source and destination address then permits or denies specific protocols
Dijkstra's Algorithm

26. Routing protocol is what?
A protocol on how to communicate with other routers
Every 30 minutes by default
120
224.0.0.5

27. What does EIGRP use to calculate it's metric?
Bandwidth & Delay
Only with Cisco IOS software release 12.3 (2) T
Telnet connectivity - authentication and extended ACLs
Supports both unequal metric load balancing and equal metric balancing.

28. How often does EIGRP send hellow packets?
Every 30 Seconds
Packets are processed before they are routed to an outbound interface.
...
Every 5 seconds

29. What does the back bone router do?
Different Autonomous Systems
Connects the different areas
Because a loopback interface is always active and cannot be in a down state like a real interface can.
110

30. By default OSPF uses what type of authentication?
Null
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Match on all routers or it will not work
Layers 1 & 2

31. Formula for determining Subnets
2^n
Every 30 minutes by default
Every 30 Seconds
Susceptible to routing loops

32. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Different Autonomous Systems
TRUE
Only topology within their respective area.

33. An autonomous system could also be referred to as what?
16
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Domain
Anycast

34. What is the default for equal cost paths for load balancing with OSPF?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
4
32768
Packet Header

35. What Layer does Frame Relay operate at?
Packets are processed before they are routed to an outbound interface.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
All backup routes for destinations.
Layers 1 & 2

36. What are the two ways routers can learn about the destination information?
Bandwidth & Delay
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Packet Header

37. Describe a Inbound ACL
Packets are processed before they are routed to an outbound interface.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Maximizing address efficiency - organization - summarization
Different Autonomous Systems

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

39. What does DLCI stand for?
Data Link Connection Identifier
Only with Cisco IOS software release 12.3 (2) T
Determines the cost which is the bandwidth
90

40. What is the Wildcard mask
Plaintext and MD5
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The inverse of a subnet mask.
Unspecified

41. How many hops are allowed with RIP?
Maximizing address efficiency - organization - summarization
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
15.....16 hops and the interface is down
Designated Router (DR) and a Back-up designated Router (BDR)

42. What is needed to pass traffic from one VLAN to another?
Area Border Router
224.0.0.10
It is the signaling standard that maintains connection and statues between the DCE and DTE
A layer 3 switch or router

43. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
Associating the network address with a local DLCI.
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available

44. Who designed OSPF?
IETF
One ACL per protocol - One ACL per direction - Once ACL per interface
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
A backbone area...Also known as Area 0

45. How does an Extended ACL work?
All backup routes for destinations.
Checks the source and destination address then permits or denies specific protocols
4 times the hello interval
A protocol on how to communicate with other routers

46. Problem with static routes
...
1
Routes First/ Tests second
Not scalable - hard to maintain as the network grows

47. What type of algorithm does OSPF & IS-IS use?
2^n
Forces protocols to behave as if they were classless
Bandwidth & Delay
Link-State

48. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
16
RIPv2 & EIGRP
Supports both unequal metric load balancing and equal metric balancing.

49. How is the root bridge determined?
4 times the hello interval
90
Checks the source address and then permits or denies the entire protocol suite
The Root bridge is the bridge with the lowest bridge ID

50. What is one to nearest
Distance Vector
A trunk
Anycast
Packet Header