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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 many hops are allowed with RIP?
RIPv2 and EIGRP
15.....16 hops and the interface is down
All backup routes for destinations.
No

2. How does an Extended ACL work?
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.
Every 5 seconds
...
Checks the source and destination address then permits or denies specific protocols

3. Describe an Outbound ACL
The Diffusing Update Algorithm (DUAL)
To select the best path to the destination
Bandwidth & Delay
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

4. What do area's do?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Null
Unspecified
Reduce the link-state database and routing table

5. Spanning-Tree cost of 100
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Loopback
Packets are processed before they are routed to an outbound interface.
10Mb/s

6. How do you configure OSPF
Every 10 seconds
Routes First/ Tests second
All backup routes for destinations.
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

7. How often does a router send link-state advertisements?
Ever 2 seconds
Every 10 seconds
Every 30 minutes by default
A backbone area...Also known as Area 0

8. What does the DR do?
No
Updates all DROTHER Routers when a change occurs
Private: link local
Every 10 Seconds

9. What are the two ways routers can learn about the destination information?
The lower MAC address
Supports both unequal metric load balancing and equal metric balancing.
Domain
1.) Enter the Routing Manually 2.) Use Dymamic Routing

10. What Layer does Frame Relay operate at?
Layers 1 & 2
Checks the source and destination address then permits or denies specific protocols
Distance Vector
The lower MAC address

11. Why is EIGRP considered a Hybrid routing protocol?
RIPv2 & EIGRP
A backbone area...Also known as Area 0
It combines the advantages of Link-State and Distance vector routing protocols.
Anycast

12. Admin distance of OSPF?
4
110
30-50 seconds
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

13. What is one to many?
A layer 3 switch or router
RIPv2 & EIGRP
Multicast
MAC based

14. Wildcard masks filter

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15. What is an ABR
For line vty 0 4
Area Border Router
Different Autonomous Systems
To select the best path to the destination

16. How are Frame Relay Circuits identified?

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17. Problem with static routes
2^n-2
The Root bridge is the bridge with the lowest bridge ID
Connects the different areas
Not scalable - hard to maintain as the network grows

18. OSPF will elect a what?
Designated Router (DR) and a Back-up designated Router (BDR)
One ACL per protocol - One ACL per direction - Once ACL per interface
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

19. What are the major components of OSPF troubleshooting?
DROTHER
Loopback
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Advance Distance Vector

20. How is the root bridge determined?
Advance Distance Vector
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
The Root bridge is the bridge with the lowest bridge ID
Dijkstra's Algorithm

21. Describe features of RIPv1
15.....16 hops and the interface is down
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
A permit statement

22. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
4
32768
Distance Vector

23. How does EIGRP work with regards to Load Balancing
It combines the advantages of Link-State and Distance vector routing protocols.
Supports both unequal metric load balancing and equal metric balancing.
It is the signaling standard that maintains connection and statues between the DCE and DTE
Cisco - ANSI - Q.933A

24. What is the default load balancing for RIP
4
MD5 and you have to enable it if you want to use it.
Layers 1 & 2
Advertised Distance & Feasible distance

25. Static VLAN is what?
Port based
Convergence
Packets are processed before they are routed to an outbound interface.
Domain

26. What does partial refer to?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
10Mb/s
224.0.0.5
The update only includes info about the route change

27. What algorithm does EIGRP use?
2^n-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.
The Diffusing Update Algorithm (DUAL)
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

28. What two classless protocols act classful by default?
TRUE
All backup routes for destinations.
Checks the source address and then permits or denies the entire protocol suite
RIPv2 & EIGRP

29. What does a trunk do?

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30. How often are LMI's sent out?
Every 10 Seconds
Reduce the link-state database and routing table
A trunk
1Gb/s

31. In Link state terminology - What is a link?
A link is an interface on a router
1Gb/s
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
4 times the hello interval

32. How often are BPDU's sent?
Ever 2 seconds
Checks the source address and then permits or denies the entire protocol suite
The inverse of a subnet mask.
Telnet connectivity - authentication and extended ACLs

33. Rip is capable of load balancing over as many as?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Six equal cost paths
It is the signaling standard that maintains connection and statues between the DCE and DTE
Convergence

34. When placing ACL's in the Network...Do what?

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35. How long is the dead interval
4 times the hello interval
It is never useful to send information about a route back in the direction from which the original info came.
Only with Cisco IOS software release 12.3 (2) T
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

36. What does the back bone router do?
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
Propagation of partial updates that are sent only to those routers that the changes affect.
Connects the different areas
...

37. Describe features of RIPv2
RIPv2 and EIGRP
Plaintext and MD5
4
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

38. What is ::1
Loopback
The lower MAC address
Cisco - ANSI - Q.933A
EIGRP - OSPF - RIP

39. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Carry's traffic for multiple VLANS
Convergence
For line vty 0 4
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.

40. OSPF routes packets within a single?
Private: link local
Autonomous System
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Advertised Distance & Feasible distance

41. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
Private: link local
Inter-VLAN routing
Only topology within their respective area.

42. What type of algorithm does EIGRP use?
Reduce the link-state database and routing table
Packet Header
Advance Distance Vector
224.0.0.10

43. Nonbackbone - internal routers are aware of what topology
1
Only topology within their respective area.
2^n
EIGRP - OSPF - RIP

44. Dynamic VLAN is what?
A trunk
2^n-2
MAC based
Test Firsts/ Routes Second

45. What is prefix length?
Aka Subnet mask
Six equal cost paths
224.0.0.5
30-50 seconds

46. When do you use Access-Class
224.0.0.5
Dijkstra's Algorithm
Inter-VLAN routing
For line vty 0 4

47. Admin distance of RIPv2
Layers 1 & 2
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
120

48. What type of algorithm does RIP use?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
By DLCI's
Distance Vector
Because a loopback interface is always active and cannot be in a down state like a real interface can.

49. How often are OSPF hello packets sent out?
Individual or group IP's
Every 10 seconds
IP
Updates all DROTHER Routers when a change occurs

50. 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
Each router builds a map of the network and determines the shortest path to every network.
Checks the source and destination address then permits or denies specific protocols
TRUE