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. Admin distance of a Static Route?
1
110
...
224.0.0.10


2. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
20 seconds: 10 missed BPDU's
Every 5 seconds
IETF
View


3. What does EIGRP use to calculate it's metric?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Bandwidth & Delay
Each router builds a map of the network and determines the shortest path to every network.
All backup routes for destinations.


4. How do you apply the ACL to an interface
MAC based
Associating the network address with a local DLCI.
All backup routes for destinations.
Make sure you are in interface mode - then use this command ip access-group 1 out/in


5. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Different Autonomous Systems
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


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

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7. What type of algorithm does OSPF & IS-IS use?
View
30-50 seconds
Link-State
Make sure you are in interface mode - then use this command ip access-group 1 out/in


8. Can you delete individual entries in a specific ACL?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Connects the different areas
Only with Cisco IOS software release 12.3 (2) T
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.


9. Explain how routing loops occur with RIP?
MAC based
It combines the advantages of Link-State and Distance vector routing protocols.
90
...


10. By default OSPF uses what type of authentication?
2^n-2
Six equal cost paths
Null
The Diffusing Update Algorithm (DUAL)


11. Break down the word Link-State

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12. How does a Standard ACL work?
Unicast - Multicast - Anycast
4
Propagation of partial updates that are sent only to those routers that the changes affect.
Checks the source address and then permits or denies the entire protocol suite


13. Why is it important to have a loopback address when using OSPF?
110
1Gb/s
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Unicast - Multicast - Anycast


14. The no auto-summary command does what?
A protocol on how to communicate with other routers
Test Firsts/ Routes Second
Forces protocols to behave as if they were classless
Select the routing protocol - then specify the network.


15. How are Frame Relay Circuits identified?

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16. How many hops are allowed with RIP?
15.....16 hops and the interface is down
RIPv2 and EIGRP
Every 5 seconds
Test Firsts/ Routes Second


17. The AS number must what?
Forces protocols to behave as if they were classless
Advertised Distance & Feasible distance
Supports both unequal metric load balancing and equal metric balancing.
Match on all routers or it will not work


18. OSPF will elect a what?
Designated Router (DR) and a Back-up designated Router (BDR)
TRUE
0
Null


19. Spanning-Tree cost of 19
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
A link is an interface on a router
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
100Mb/s


20. What is passing VLAN traffic to another called?
Inter-VLAN routing
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
2^n-2
Forces protocols to behave as if they were classless


21. What does the DR do?
Updates all DROTHER Routers when a change occurs
Telnet connectivity - authentication and extended ACLs
Susceptible to routing loops
Layers 1 & 2


22. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
A combination of Link-state and distance vector
The lower MAC address
...
Unspecified


23. How does inbound ACL work?
Adjacency
Test Firsts/ Routes Second
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Forces protocols to behave as if they were classless


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

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25. In frame relay What is Inverse Arp
The lower MAC address
Associating the network address with a local DLCI.
Only topology within their respective area.
Convergence


26. Purpose of a Routing Protocol?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Supports both unequal metric load balancing and equal metric balancing.
Checks the source and destination address then permits or denies specific protocols
Designated Router (DR) and a Back-up designated Router (BDR)


27. In regards to ACL's What are the three protocols?
Packet Header
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
One ACL per protocol - One ACL per direction - Once ACL per interface
Disable auto summarization


28. Describe a Inbound ACL
Packets are processed before they are routed to an outbound interface.
Every 30 Seconds
Routes First/ Tests second
Plaintext and MD5


29. What are the three LMI standards
Select the routing protocol - then specify the network.
Cisco - ANSI - Q.933A
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
No


30. Spanning-Tree cost of 100
10Mb/s
MAC based
Updates all DROTHER Routers when a change occurs
90


31. Routers are used for what?
1
224.0.0.10
To select the best path to the destination
10Mb/s


32. Why is this done?
Link-State
To reduce OSPF traffic
0
Advertised Distance & Feasible distance


33. Who designed OSPF?
IETF
120
It is the signaling standard that maintains connection and statues between the DCE and DTE
0


34. When do you use Access-Class
For line vty 0 4
Connects the different areas
RIPv2 & EIGRP
Port based


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

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36. What are subinterfaces?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
IETF
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Multiple virtual interfaces that are associated with one physical interface


37. What is ::
MD5 and you have to enable it if you want to use it.
Unspecified
100Mb/s
2^n-2


38. Why is EIGRP considered a Hybrid routing protocol?
It combines the advantages of Link-State and Distance vector routing protocols.
Updates all DROTHER Routers when a change occurs
TRUE
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


39. What algorithm does EIGRP use?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Designated Router (DR) and a Back-up designated Router (BDR)
The Diffusing Update Algorithm (DUAL)
Every 10 Seconds


40. OSPF routes packets within a single?
The Diffusing Update Algorithm (DUAL)
Domain
Autonomous System
RIPv2 & EIGRP


41. Formula for determining Subnets
2^n
Test Firsts/ Routes Second
Different Autonomous Systems
It is the signaling standard that maintains connection and statues between the DCE and DTE


42. Example of a Routed Protocol?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Loopback
IP
Every 10 seconds


43. What distant vector protocols exhibit classless behavior?
Unicast - Multicast - Anycast
RIPv2 and EIGRP
Carry's traffic for multiple VLANS
Advance Distance Vector


44. VTP Transparent Mode does what?

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45. Admin distance of EIGRP?
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.
16
90
A layer 3 switch or router


46. Exterior Gateway Protocols are designed for use between
4
Not scalable - hard to maintain as the network grows
Different Autonomous Systems
Each router builds a map of the network and determines the shortest path to every network.


47. What do area's do?
Reduce the link-state database and routing table
To reduce OSPF traffic
All backup routes for destinations.
Every 5 seconds


48. What are the major components of OSPF troubleshooting?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Bandwidth & Delay
Plaintext and MD5
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


49. What are two statements that are true of IPv6 address representation?
Susceptible to routing loops
15.....16 hops and the interface is down
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Null


50. What is one to nearest
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Anycast
A link is an interface on a router
Multicast