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. In Link state terminology - What is a link?
A link is an interface on a router
One ACL per protocol - One ACL per direction - Once ACL per interface
Telnet connectivity - authentication and extended ACLs
A layer 3 switch or router

2. How often are periodic updates sent out via RIP
0
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 a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Every 30 Seconds

3. How many hops are allowed with RIP?
Associating the network address with a local DLCI.
15.....16 hops and the interface is down
MAC based
Layers 1 & 2

4. An autonomous system could also be referred to as what?
Select the routing protocol - then specify the network.
Only with Cisco IOS software release 12.3 (2) T
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Domain

5. What is one to many?
Multicast
Link-State
To reduce OSPF traffic
Convergence

6. What are two statements that are true of IPv6 address representation?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Only topology within their respective area.
Telnet connectivity - authentication and extended ACLs

7. How does the SPF determine the shortest path?
110
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
The Diffusing Update Algorithm (DUAL)
Determines the cost which is the bandwidth

8. With OSPF - there must always be a area......
Link-State
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Every 10 Seconds
0

9. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Every 10 seconds
Automatically
View
Unspecified

10. Every ACL will need what?
IP
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
A permit statement
Advertised Distance & Feasible distance

11. Nonbackbone - internal routers are aware of what topology
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.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
The Diffusing Update Algorithm (DUAL)
Only topology within their respective area.

12. What are two OSPF authentication methods?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
A permit statement
Plaintext and MD5
Layers 1 & 2

13. 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 inverse of a subnet mask.
EIGRP - OSPF - RIP
1

14. Routing protocol is what?
A protocol on how to communicate with other routers
Port based
Data Link Connection Identifier
224.0.0.5

15. Admin distance of a connected Network?
Cisco - ANSI - Q.933A
Null
Carry's traffic for multiple VLANS
0

16. Purpose of a Routing Protocol?
30-50 seconds
Private: link local
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
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

17. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Anycast
For line vty 0 4
TRUE
Carry's traffic for multiple VLANS

18. What are subinterfaces?
20 seconds: 10 missed BPDU's
A combination of Link-state and distance vector
Multiple virtual interfaces that are associated with one physical interface
It is never useful to send information about a route back in the direction from which the original info came.

19. With OSPF - what must be defined?
To select the best path to the destination
Port based
The Diffusing Update Algorithm (DUAL)
A backbone area...Also known as Area 0

20. Static VLAN is what?
Individual or group IP's
Port based
To reduce OSPF traffic
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.

21. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
IETF
Multiple virtual interfaces that are associated with one physical interface
Every 10 Seconds
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.

22. Normal time for STP convergence
Dijkstra's Algorithm
30-50 seconds
Unspecified
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

23. How is an EUI-64 format interface ID created from a 48-Bit MAC address
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
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Null

24. How do you apply the ACL to an interface
Null
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Unspecified

25. OSPF routes packets within a single?
The update only includes info about the route change
Packet Header
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Autonomous System

26. What does EIGRP use to calculate it's metric?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Bandwidth & Delay
30-50 seconds
Not scalable - hard to maintain as the network grows

27. By default OSPF uses what type of authentication?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
The Diffusing Update Algorithm (DUAL)
Link-State
Null

28. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Packets are processed before they are routed to an outbound interface.
No
Only with Cisco IOS software release 12.3 (2) T
16

29. What does partial refer to?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
The inverse of a subnet mask.
The update only includes info about the route change
It is the signaling standard that maintains connection and statues between the DCE and DTE

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

31. What type of algorithm does RIP use?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Forces protocols to behave as if they were classless
Checks the source and destination address then permits or denies specific protocols
Distance Vector

32. Can you delete individual entries in a specific ACL?
20 seconds: 10 missed BPDU's
All backup routes for destinations.
Only with Cisco IOS software release 12.3 (2) T
Determines the cost which is the bandwidth

33. Describe features of RIPv1
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
Unicast - Multicast - Anycast
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Every 30 minutes by default

34. For a VLAN to span across multiple switches What is required?
It is never useful to send information about a route back in the direction from which the original info came.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
A trunk
30-50 seconds

35. Who designed OSPF?
30-50 seconds
IETF
Susceptible to routing loops
Scalable and fast convergence

36. Admin distance of RIPv2
120
Multicast
0
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

37. Explain how routing loops occur with RIP?
Cisco - ANSI - Q.933A
Every 5 seconds
Scalable and fast convergence
...

38. How does Link-State work?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Scalable and fast convergence
Each router builds a map of the network and determines the shortest path to every network.
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.

39. What two things need to be done to enable dynamic routing?
Port based
Updates all DROTHER Routers when a change occurs
RIPv2 & EIGRP
Select the routing protocol - then specify the network.

40. How are Frame Relay Circuits identified?

41. What is the default for equal cost paths for load balancing with OSPF?
15.....16 hops and the interface is down
4
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
2^n

42. What is a VLAN
Not scalable - hard to maintain as the network grows
A group of end stations with a common set of requirements - independent of their physical location
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Forces protocols to behave as if they were classless

43. For an adjacency to occur what do the routers have to agree on?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
90
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Unicast - Multicast - Anycast

44. How do you configure OSPF
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Link-State
IETF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

45. The time delay for a router to match a network change?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Convergence
Determines the cost which is the bandwidth

46. What is the dead interval
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.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Test Firsts/ Routes Second

47. How often are BPDU's sent?
Ever 2 seconds
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

48. How often does a router send link-state advertisements?
TRUE
For line vty 0 4
Checks the source address and then permits or denies the entire protocol suite
Every 30 minutes by default

49. When do you use Access-Class
For line vty 0 4
Connects the different areas
Telnet connectivity - authentication and extended ACLs
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.

50. In regards to ACL's What are the three protocols?
A protocol on how to communicate with other routers
Telnet connectivity - authentication and extended ACLs
One ACL per protocol - One ACL per direction - Once ACL per interface
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.