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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. What is the default for equal cost paths for load balancing with OSPF?
Routes First/ Tests second
Convergence
Multiple virtual interfaces that are associated with one physical interface
4

2. Spanning-Tree cost of 19
Between areas?
20 seconds: 10 missed BPDU's
To reduce OSPF traffic
100Mb/s

3. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Every 30 Seconds
A combination of Link-state and distance vector
View

4. Dynamic ACL's are dependent on what?
To select the best path to the destination
20 seconds: 10 missed BPDU's
30-50 seconds
Telnet connectivity - authentication and extended ACLs

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

6. In Link state terminology - What is a link?
A layer 3 switch or router
Packet Header
A link is an interface on a router
Plaintext and MD5

7. VTP Client Mode does what?

8. What do you need to do if there are discontigous networks with EIGRP?
Autonomous System
Disable auto summarization
Domain
Only topology within their respective area.

9. The advantages of VLSM
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Forces protocols to behave as if they were classless
Maximizing address efficiency - organization - summarization
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.

10. What is the spilt horizon rule?
By DLCI's
30-50 seconds
It is never useful to send information about a route back in the direction from which the original info came.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.

11. In regards to troubleshooting OSPF what should you check?
No
10Mb/s
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Updates all DROTHER Routers when a change occurs

12. What is the default Bridge priority?
32768
1
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Multicast

13. With OSPF - what must be defined?
A backbone area...Also known as Area 0
Private: link local
Link-State
Between areas?

14. The no auto-summary command does what?
Forces protocols to behave as if they were classless
IP
Every 10 seconds
Between areas?

15. Admin distance of OSPF?
100Mb/s
Bandwidth & Delay
110
224.0.0.10

16. Dynamic VLAN is what?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Domain
MAC based
Designated Router (DR) and a Back-up designated Router (BDR)

17. What does DLCI stand for?
Associating the network address with a local DLCI.
Automatically
Data Link Connection Identifier
A link is an interface on a router

18. When do you use Access-Class
Individual or group IP's
One ACL per protocol - One ACL per direction - Once ACL per interface
For line vty 0 4
...

19. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
A link is an interface on a router
Each router builds a map of the network and determines the shortest path to every network.
TRUE
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

20. With OSPF - there must always be a area......
To select the best path to the destination
0
20 seconds: 10 missed BPDU's
Every 30 minutes by default

21. What does a trunk do?

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

23. How does a Standard ACL work?
Between areas?
TRUE
Checks the source address and then permits or denies the entire protocol suite
Aka Subnet mask

24. Describe features of RIPv2
...
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.
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
30-50 seconds

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

26. Benefits of OSPF?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Scalable and fast convergence
Adjacency

27. What is ::1
2^n
Loopback
Associating the network address with a local DLCI.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

28. What does the DR do?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Designated Router (DR) and a Back-up designated Router (BDR)
Updates all DROTHER Routers when a change occurs
Cisco - ANSI - Q.933A

29. How does an Extended ACL work?
Every 10 Seconds
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Checks the source and destination address then permits or denies specific protocols
Susceptible to routing loops

30. An autonomous system could also be referred to as what?
One ACL per protocol - One ACL per direction - Once ACL per interface
Domain
To select the best path to the destination
Every 30 minutes by default

31. In regards to ACL's What are the three protocols?
2^n
One ACL per protocol - One ACL per direction - Once ACL per interface
Bandwidth & Delay
It combines the advantages of Link-State and Distance vector routing protocols.

32. Who designed OSPF?
Multiple virtual interfaces that are associated with one physical interface
Unspecified
IETF
Private: link local

33. The AS number must what?
Test Firsts/ Routes Second
Match on all routers or it will not work
One ACL per protocol - One ACL per direction - Once ACL per interface
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

34. Admin distance of a connected Network?
4 times the hello interval
Ever 2 seconds
0
Packet Header

35. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Dijkstra's Algorithm
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Adjacency
Maximizing address efficiency - organization - summarization

36. VTP Transparent Mode does what?

37. How many hops are allowed with RIP?
Aka Subnet mask
A combination of Link-state and distance vector
15.....16 hops and the interface is down
A group of end stations with a common set of requirements - independent of their physical location

38. How often does EIGRP send hellow packets?
It combines the advantages of Link-State and Distance vector routing protocols.
Every 5 seconds
Only with Cisco IOS software release 12.3 (2) T
15.....16 hops and the interface is down

39. Nonbackbone - internal routers are aware of what topology
Carry's traffic for multiple VLANS
Each router builds a map of the network and determines the shortest path to every network.
Only topology within their respective area.
Propagation of partial updates that are sent only to those routers that the changes affect.

40. What two classless protocols act classful by default?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
1Gb/s
Bandwidth & Delay
RIPv2 & EIGRP

41. What algorithm does EIGRP use?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Every 30 minutes by default
The Diffusing Update Algorithm (DUAL)
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication

42. How does inbound ACL work?
EIGRP - OSPF - RIP
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Test Firsts/ Routes Second
MAC based

43. How often does a router send link-state advertisements?
A permit statement
Updates all DROTHER Routers when a change occurs
Every 30 minutes by default
Area Border Router

44. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
16
It combines the advantages of Link-State and Distance vector routing protocols.
Individual or group IP's

45. What type of algorithm does EIGRP use?
Packets are processed before they are routed to an outbound interface.
The lower MAC address
Advance Distance Vector
Updates all DROTHER Routers when a change occurs

46. Static VLAN is what?
Port based
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
All backup routes for destinations.
Ever 2 seconds

47. What do area's do?
IP
Routes First/ Tests second
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Reduce the link-state database and routing table

48. How does Link-State work?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Bandwidth & Delay
Each router builds a map of the network and determines the shortest path to every network.
The inverse of a subnet mask.

49. A router running EIGRP will store what?
All backup routes for destinations.
Make sure you are in interface mode - then use this command ip access-group 1 out/in
A link is an interface on a router
1.) Enter the Routing Manually 2.) Use Dymamic Routing

50. By default OSPF uses what type of authentication?
Null
By DLCI's
Loopback
Convergence