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 and EIGRP use what to keep other routers aware of their status?
100
Switch forwards the frame as soon as it can
180 seconds
Periodic Updates of their routing table


2. What gets the clock rate - DCE or DTE?
DCE
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
Hop Count
Transport


3. How many Collision domains are there on a with 1 hub and 1 bridge 2 computers?
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
/24
2 - the bridge separates the collision domain
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)#


4. Subnetting: How many hosts per network if the subnet mask is 255.255.255.192
1-65535
Every 128 ip's
Transport
62 per network


5. Rip Timers: How long is the default for Invalid timer.
Query and other router responds with a REPLY packet.
180 seconds
IEEE 802.3
100


6. Using the magic number how to you figure the broadcast?
R3(config)#router rip - R3(config-router)#network 192.168.1.2
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
Add the magic number to the network minus 1
Periodic Updates of their routing table


7. Using the magic number how to you figure the network?
255.255.255.252
Router(config)#ip route {network address} {subnet-mask}
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
Closest multiple of the magic number that is not over the interesting octets number.


8. Switching Methods: What is Cut-through?
Periodic Updates of their routing table
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
Switch forwards the frame as soon as it can
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


9. EIGRP: What is the default administrative distance?
R
2 - the bridge separates the collision domain
R1(config)#router rip - R1(config-router)#version 2
100


10. What is the Data-Link PDU called?
255.255.255.252
Data-Link
Frames
Every 16 ip's


11. IEEE Standards: Fast Ethernet
/28
Every 8 ip's
IEEE 802.3u
/24


12. Rip: Command to prevent rip updates on an interface
IEEE 802.3u
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
Segments
IEEE 802.3


13. Subnetting: What is a /16 in Decimal
Every 128 ip's
Segments
Switch forwards frame once it completely receives it
255.255.0.0


14. Subnetting: where do the networks break with a /27

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15. 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
255.255.255.224
255.255.255.252
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds


16. Rip: What causes a triggered update?
Bandwidth - Delay - reliability and Load
R
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
IEEE 802.3ab


17. Command for a static route with exit interface
Closest multiple of the magic number that is not over the interesting octets number.
120
Switch forwards the frame as soon as it can
Router(config)#ip route {exit-interface}


18. CABLES: What is the T568B Pinout Standard?
180
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)#
110
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown


19. What Layer does CDP operate at?
/9
Layer 2
IEEE 802.3ab
Every 64 ip's


20. What are the commands to setup SSH?
Every 32 ip's
100
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)#
Router(config)#ip route {exit-interface}


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

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22. IEEE Standards: Gibabit Ethernet (Copper)
IEEE 802.3ab
Show ip eigrp topology
R3(config)#router rip - R3(config-router)#network 192.168.1.2
60


23. What is the boot sequence for Cisco Routers?
180
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)
/22
126 per network


24. What is the Transport PDU called?
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)#
Closest multiple of the magic number that is not over the interesting octets number.
Query and other router responds with a REPLY packet.
Segments


25. Name the OSI Layers
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
R
126 per network


26. What is the metric for RIP
Hop Count
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
126 per network
2 - the bridge separates the collision domain


27. Subnetting: What is a /27 in Decimal
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.
IEEE 802.3
255.255.255.224
60


28. Rip: What is the command to enable Ripv2?
1-65535
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
Transport
R1(config)#router rip - R1(config-router)#version 2


29. Subnetting: What is a 255.255.252.0 in prefix notation
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Add the magic number to the network minus 1
/22
Bandwidth - Delay - reliability and Load


30. EIGRP: What is the name of the algorithm used for EIGRP?
180
Router(config)#ip route {network address} {subnet-mask}
2 - each port is it's own collision domain
DUAL: Difusing Update Algorithm


31. IEEE Standards: Gibabit Ethernet (Fibre)
Every 16 ip's
IEEE 802.3z
Router(config)#ip route {network address} {subnet-mask}
Shortest path first - (SPF)


32. Rip: What does v2 have that v1 does not?
Every 32 ip's
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
Switch forwards the frame as soon as it can


33. EIGRP: What packet is used to search for networks?
Query and other router responds with a REPLY packet.
110
DCE
Periodic Updates of their routing table


34. RIP Timers: What is an invalid Timer?
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
Layer 2
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.
255.255.0.0


35. Rip Timers: How long is the default for Holddown timer.
2 - the bridge separates the collision domain
IEEE 802.3
180
Query and other router responds with a REPLY packet.


36. What is the Network PDU called?
Segments
126 per network
Every 128 ip's
Packets


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

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38. What is Layer 4 in the OSI Model?
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Transport
/22
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.


39. Subnetting: How many hosts per network if the subnet mask is 255.255.255.252
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
2 hosts
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
Packets


40. Subnetting: where do the networks break with a /25

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41. What is Layer 2 in the OSI Model?
Application
255.255.255.128
Data-Link
IEEE 802.3ab


42. OSPF: What is the default administrative distance?
Frames
110
R3(config)#router rip - R3(config-router)#network 192.168.1.2
255.255.255.128


43. Subnetting: What is a 255.128.0.0 in prefix notation
Transport
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)
/9
Every 8 ip's


44. What is Layer 3 in the OSI Model?
Application
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
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)#
Network


45. IEEE Standards: Ethernet
30 per network
IEEE 802.3
/22
255.255.255.252


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

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47. What is the layer 4 PDU called?
Segments
Shortest path first - (SPF)
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
Bellman-Ford


48. How do you find the magic number for subnetting?
Every 64 ip's
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
Data-Link


49. Subnetting: What is a /18 in Decimal
Network
IEEE 802.3
255.255.255.252
255.255.192.0


50. Subnetting: How many hosts per network if the subnet mask is 255.255.255.224
/9
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
30 per network
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown