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. Rip: how do hold down timers work?
62 per network
R3(config)#router rip - R3(config-router)#network 192.168.1.2
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
1. Router receives update from neighbor indicating a route down - Router makes route as down and starts holddown timer - If router gets an update indicating route is back holddown is removed - If an update is received indicating route is down again i


2. OSPF: What Algorithm is used?
Shortest path first - (SPF)
180 seconds
Hop Count
Every 32 ip's


3. RIP: Commands to enable ripv1 on a router and add a route to 192.168.1.2
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
R3(config)#router rip - R3(config-router)#network 192.168.1.2
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
Show ip eigrp topology


4. Subnetting: where do the networks break with a /26

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5. CABLES: What is the T568B Pinout Standard?
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
Add the magic number to the network minus 1
2 - the bridge separates the collision domain
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE


6. How many Collision domains are there on a with 1 hub and 2 computers?
Every 128 ip's
1 - everything hooked to the hub is in the same collision domain
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
This timer stabilizes routing information and helps prevent routing loops during periods when the topology is converging on new information. Once a route is marked as unreachable - it must stay in holddown long enough for all routers in the topology


7. What is Layer 2 in the OSI Model?
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
Data-Link
R
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0


8. Subnetting: How many hosts per network if the subnet mask is 255.255.255.240
DUAL: Difusing Update Algorithm
Every 128 ip's
Closest multiple of the magic number that is not over the interesting octets number.
14 per network


9. EIGRP: How do you view if there are any successor routes?
Router(config)#hostname R1 - R1(config)#line VTY 0 4 - R1(config-line)#login local - R1(config-line)#transport input telnet ssh - R1(config-line)#exit - R1(config)#username {user} password {pass} - R1(config)#ip domain-name {domainname} - R1(config)#
255.255.192.0
Show ip eigrp topology
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown


10. What is the metric for EIGRP
Bandwidth - Delay - reliability and Load
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
Switch forwards the frame as soon as it can
IEEE 802.3z


11. EIGRP: What packet is used to propagate routing information?
100
IEEE 802.3z
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet


12. Using the magic number how to you figure the broadcast?
R3(config)#router rip - R3(config-router)#network 192.168.1.2
126 per network
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
Add the magic number to the network minus 1


13. What is Layer 5 in the OSI Model?
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
This timer stabilizes routing information and helps prevent routing loops during periods when the topology is converging on new information. Once a route is marked as unreachable - it must stay in holddown long enough for all routers in the topology
Session
Periodic Updates of their routing table


14. Name the OSI Layers
180
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
Segments


15. IEEE Standards: Gibabit Ethernet (Fibre)
180 seconds
Network
IEEE 802.3z
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database


16. Subnetting: What is a 255.255.252.0 in prefix notation
Every 8 ip's
R1(config)#router eigrp 7 - R1(config-router)#network 192.168.1.0 0.0.0.3
/22
62 per network


17. What is the layer 3 PDU called?
Packets
Query and other router responds with a REPLY packet.
IEEE 802.3z
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical


18. OSPF: how do you change the cost of an interface for OSPF?
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
/9
255.255.192.0
1. Router receives update from neighbor indicating a route down - Router makes route as down and starts holddown timer - If router gets an update indicating route is back holddown is removed - If an update is received indicating route is down again i


19. How many Collision domains are there on a with 1 switch 2 computers?

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20. Subnetting: where do the networks break with a /30

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21. How do you find the magic number for subnetting?
2 - each port is it's own collision domain
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
Frames


22. Switching Methods: What is Fragment-free?
Physical
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
180


23. What is the layer 4 PDU called?
Segments
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
110


24. Rip Timers: How long is the default for Holddown timer.
180
Show ip eigrp topology
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
255.255.192.0


25. RIP Timers: What is an Holddown Timer?
Show ip eigrp topology
This timer stabilizes routing information and helps prevent routing loops during periods when the topology is converging on new information. Once a route is marked as unreachable - it must stay in holddown long enough for all routers in the topology
Data-Link
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet


26. What is Layer 1 in the OSI Model?
60
IEEE 802.3
1. Router receives update from neighbor indicating a route down - Router makes route as down and starts holddown timer - If router gets an update indicating route is back holddown is removed - If an update is received indicating route is down again i
Physical


27. Switching Methods: What is Cut-through?
Session
30 per network
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
Switch forwards the frame as soon as it can


28. RIP Timers: What is an Flush Timer?
Frames
By default - the flush timer is set for 240 seconds - which is 60 seconds longer than the invalid timer. When the flush timer expires - the route is removed from the routing table.
Every 8 ip's
180


29. Subnetting: where do the networks break with a /29

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30. What are the commands to setup SSH?
Router(config)#hostname R1 - R1(config)#line VTY 0 4 - R1(config-line)#login local - R1(config-line)#transport input telnet ssh - R1(config-line)#exit - R1(config)#username {user} password {pass} - R1(config)#ip domain-name {domainname} - R1(config)#
IEEE 802.3z
Every 8 ip's
Hop Count


31. What is the Transport PDU called?
Switch forwards the frame as soon as it can
Segments
Packets
/22


32. Rip and EIGRP use what to keep other routers aware of their status?
Shortest path first - (SPF)
Every 128 ip's
60
Periodic Updates of their routing table


33. What is Layer 3 in the OSI Model?
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Network


34. Subnetting: What is a 255.255.255.0 in prefix notation
Switch forwards frame once it completely receives it
Add the magic number to the network minus 1
/24
100


35. Rip: What does v2 have that v1 does not?
/24
R
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
Frames


36. Subnetting: What is a 255.128.0.0 in prefix notation
Periodic Updates of their routing table
/9
Query and other router responds with a REPLY packet.
IEEE 802.3z


37. IEEE Standards: Gibabit Ethernet (Copper)
R1(config)#router eigrp 7 - R1(config-router)#network 192.168.1.0 0.0.0.3
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
/28
IEEE 802.3ab


38. What is Layer 4 in the OSI Model?
Transport
Segments
IEEE 802.3z
255.255.192.0


39. CABLES: What is the T568A Pinout Standard?
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
180 seconds
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1


40. RIP Timers: What is an invalid Timer?
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.
/9
Router(config)#ip route {network address} {subnet-mask}
Shortest path first - (SPF)


41. Rip: What is the command to enable Ripv2?
R1(config)#router rip - R1(config-router)#version 2
Transport
Bellman-Ford
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1


42. How many Collision domains are there on a with 1 hub and 1 bridge 2 computers?
2 - the bridge separates the collision domain
255.255.255.128
Session
Every 32 ip's


43. OSPF: What is the default administrative distance?
Application
180 seconds
1-65535
110


44. Subnetting: where do the networks break with a /28

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45. OSPF: How does OSPF calulate the cost of each route - to figure out which way to go?
DUAL: Difusing Update Algorithm
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
IEEE 802.3ab
Router(config)# router rip - Router(config-router)# passive-interface fa0/0


46. Rip: What causes a triggered update?
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
2 hosts
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
IEEE 802.3z


47. RIP: What is the default Administrative Distance?
255.255.255.252
/9
14 per network
120


48. Subnetting: How many hosts per network if the subnet mask is 255.255.255.128
Frames
126 per network
DUAL: Difusing Update Algorithm
Data-Link


49. Rip Timers: How long is the default for Flush timer.
Presentation
60
Add the magic number to the network minus 1
Every 128 ip's


50. Command for a static route with 'Next Hop' Address
62 per network
Router(config)#ip route {network address} {subnet-mask}
R1(config)#router rip - R1(config-router)#version 2
Show ip eigrp topology