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. Formula for determining hosts
Susceptible to routing loops
2^n-2
Not scalable - hard to maintain as the network grows
Bandwidth & Delay


2. In frame relay What is Inverse Arp
Associating the network address with a local DLCI.
A backbone area...Also known as Area 0
The Root bridge is the bridge with the lowest bridge ID
Only topology within their respective area.


3. Purpose of a Routing Protocol?
Associating the network address with a local DLCI.
EIGRP - OSPF - RIP
IETF
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


4. VTP Client Mode does what?

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5. Problem with RIP
Susceptible to routing loops
Private: link local
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


6. An autonomous system could also be referred to as what?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
30-50 seconds
Domain
Unspecified


7. How do you configure OSPF
Ever 2 seconds
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
View


8. How does the SPF determine the shortest path?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Null
32768
Determines the cost which is the bandwidth


9. What type of authentication does EIGRP use?
Every 10 Seconds
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.
MD5 and you have to enable it if you want to use it.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


10. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Designated Router (DR) and a Back-up designated Router (BDR)
Anycast
TRUE
100Mb/s


11. What algorithm does EIGRP use?
Routes First/ Tests second
Only with Cisco IOS software release 12.3 (2) T
The Diffusing Update Algorithm (DUAL)
Domain


12. What address is FE80:/10
Private: link local
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Different Autonomous Systems
Checks the source and destination address then permits or denies specific protocols


13. What is the default for equal cost paths for load balancing with OSPF?
4
Packet Header
2^n
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.


14. Max_age time for BPDU's

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15. What are non designated routers called?
A protocol on how to communicate with other routers
DROTHER
Domain
It is the signaling standard that maintains connection and statues between the DCE and DTE


16. VTP Server Mode does what?

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17. What is needed to pass traffic from one VLAN to another?
Different Autonomous Systems
Autonomous System
A layer 3 switch or router
Data Link Connection Identifier


18. Describe features of RIPv2
2^n-2
The lower MAC address
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
A group of end stations with a common set of requirements - independent of their physical location


19. What is the Wildcard mask
Select the routing protocol - then specify the network.
Advertised Distance & Feasible distance
Dijkstra's Algorithm
The inverse of a subnet mask.


20. How does a Standard ACL work?
Associating the network address with a local DLCI.
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Checks the source address and then permits or denies the entire protocol suite
Bandwidth & Delay


21. The time delay for a router to match a network change?
IP
Individual or group IP's
Convergence
Multiple virtual interfaces that are associated with one physical interface


22. Admin distance of EIGRP?
90
To reduce OSPF traffic
All backup routes for destinations.
Domain


23. Describe an Outbound ACL
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.
No
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Adjacency


24. Why is EIGRP considered a Hybrid routing protocol?
224.0.0.10
It combines the advantages of Link-State and Distance vector routing protocols.
10Mb/s
A link is an interface on a router


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

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26. What is ::1
Loopback
IP
Dijkstra's Algorithm
A protocol on how to communicate with other routers


27. In regards to troubleshooting OSPF what should you check?
Inter-VLAN routing
100Mb/s
1Gb/s
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


28. What are the major components of OSPF troubleshooting?
MD5 and you have to enable it if you want to use it.
20 seconds: 10 missed BPDU's
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
4 times the hello interval


29. Routers are used for what?
To select the best path to the destination
Data Link Connection Identifier
Each router builds a map of the network and determines the shortest path to every network.
Only with Cisco IOS software release 12.3 (2) T


30. For an adjacency to occur what do the routers have to agree on?
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
Not scalable - hard to maintain as the network grows
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


31. What do you need to do if there are discontigous networks with EIGRP?
Scalable and fast convergence
100Mb/s
Cisco - ANSI - Q.933A
Disable auto summarization


32. Spanning-Tree cost of 100
10Mb/s
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Between areas?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


33. Why is this done?
Only with Cisco IOS software release 12.3 (2) T
Each router builds a map of the network and determines the shortest path to every network.
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
To reduce OSPF traffic


34. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Select the routing protocol - then specify the network.
Only with Cisco IOS software release 12.3 (2) T
Associating the network address with a local DLCI.
View


35. What is the spilt horizon rule?
It is the signaling standard that maintains connection and statues between the DCE and DTE
It is never useful to send information about a route back in the direction from which the original info came.
Layers 1 & 2
Between areas?


36. How many hops are allowed with RIP?
15.....16 hops and the interface is down
Anycast
It is never useful to send information about a route back in the direction from which the original info came.
Checks the source address and then permits or denies the entire protocol suite


37. Describe features of RIPv1
Each router builds a map of the network and determines the shortest path to every network.
0
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
It is the signaling standard that maintains connection and statues between the DCE and DTE


38. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
16
A backbone area...Also known as Area 0
Select the routing protocol - then specify the network.


39. Admin distance of a Static Route?
1
A protocol on how to communicate with other routers
DROTHER
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


40. The no auto-summary command does what?
The update only includes info about the route change
Dijkstra's Algorithm
Forces protocols to behave as if they were classless
Maximizing address efficiency - organization - summarization


41. Explain OSPF

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42. How often does a router send link-state advertisements?
Determines the cost which is the bandwidth
Bandwidth & Delay
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Every 30 minutes by default


43. Classful Protocols summarize
Make sure you are in interface mode - then use this command ip access-group 1 out/in
20 seconds: 10 missed BPDU's
Automatically
No


44. How is the root bridge determined?
Only with Cisco IOS software release 12.3 (2) T
The Root bridge is the bridge with the lowest bridge ID
Packet Header
Loopback


45. OSPF will elect a what?
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.
Every 5 seconds
IP
Designated Router (DR) and a Back-up designated Router (BDR)


46. Dynamic ACL's are dependent on what?
Area Border Router
Telnet connectivity - authentication and extended ACLs
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


47. What is an ABR
Area Border Router
A permit statement
Domain
Adjacency


48. What are subinterfaces?
90
A trunk
Multiple virtual interfaces that are associated with one physical interface
To select the best path to the destination


49. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
Connects the different areas
The update only includes info about the route change
...


50. What is one to nearest
Anycast
Multicast
Aka Subnet mask
DROTHER