Test your basic knowledge |

Ethernet Technologies

Subject : it-skills

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 error-disable state?
Feature Manager (FM) and Switching Database Manager (SDM)
Switch(config-if)#shutdown
A switch port that has been shut down automatically due to a serious error condition
Through exchange of information - which means that for one end to successfully negotiate duplex mode the other end must also be set to autonegotiate

2. What is FIB?
Forwarding Information Base
With a mask value in addition to binary values to decide which keys in a table are relevant
Gigabit Ethernet over 1 pair Shielded Twisted Pair (STP) cabling
The Punt adjacency

3. What is the prerequesite for creating a working SVI?
300 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Off
Creating the VLAN
Switch(config)#interface range macro {name}

4. What is 10GBASE-CX4?
10 Gigabit Ethernet over copper CX4 with Infiniband connectors
40 km
Switch(config)#errdisable detect cause bpduguard
Switch(config)#errdisable detect cause {all | {cause-name}}

5. What are the common cabling specifications for Gigabit Ethernet?
Switch(config-if)#shutdown
Switch#show mac address-table dynamic [address {mac-address}] [interface {interface}] [vlan {vlan}]
Switch#show errdisable detect
1000BASE-CX - 1000BASE-T - 1000-BASE-SX - 1000-BASE-LX/LH and 1000-BASE-ZX

6. What information is stored in TCAM?
A station must wait its turn to transmit; it can't transmit and receive at the same time
100 metres
Switch(config-if)#no switchport
Security and QoS ACLs

7. Enables error-disable for errors with Layer 2 Protocol Tunnelling
Switch(config)#errdisable detect cause l2ptguard
Source IP (/32) - Destination IP (/32) - Protocol (/16) - IP ToS (/8) - Source port (/16) - Source operator (/4) - Destination port (/16) - Destination operator (/4)
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Down - static access - trunk or tunnel

8. What is a SVI?
Switched virtual interface (SVI)
The Null adjacency
A name assigned to a ranges of interfaces
From 30 seconds to 86 -400 seconds (24 hours)

9. What is 10GBASE-X?
Cabling specifications for 10 Gigabit Ethernet
Numeric values that represent what action to take after the TCAM lookup occurs
Switch#show ip cef {interface} [detail]
A station must wait its turn to transmit; it can't transmit and receive at the same time

10. How is link speed determined on Fast Ethernet links configured to autonegotiate?
Packets that have been truncated before they were fully received
By electrical signalling so that either end of a link can determine what speed the other end is trying to use
Switch(config)#interface {type}{module}/{number}
Full duplex only

11. What is the role of a Switch Engine (SE) in first generation MLS?
Stations can transmit and receive at the same time because switched Ethernet removes the possibility of collisions
The Layer 3 engine
Listen to the first packet and put its resulting destination in the MLS cache; Route subsequent packets in the same flow based on the MLS cache
Switch(config)#define interface-range {macro-name} {type} {module}/{number} [- {number}] [ - {type} {module}/{number} ...]

12. What is the maximum cabling distance for 10GBASE-LR/LW?
10 km
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error
Switch(config)#default interface {interface}

13. What is the maximum cabling distance for 10GBASE-ER/EW?
Switch#show ip cef
40 km
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
Switched virtual interface (SVI)

14. What is the maximum cabling distance for 10GBASE-LX4/LW4?
300 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Switch(config-if)#speed {10 | 100 | 1000 | auto}
Switch(config-if)#no ip route-cache cef
Distributed CEF (dCEF)

15. What is the operational mode of a switch port that is a member of one VLAN?
Institute of Electrical and Electronics Engineers
Ternary Content-Addressable Memory
Forwarding Information Base
Static access

16. What is 1000BASE-CX?
Switch(config)#default interface {interface}
Gigabit Ethernet over 1 pair Shielded Twisted Pair (STP) cabling
10 Gigabit Ethernet over 9 micron SMF (1310 nm serial laser)
1 -2 on one end with 3 -6 on the other end

17. What is LAN PHY used for?
Layer 3 routing information builds and pre-populates a single database of the entire network topology; All table lookups are performed in hardware with the longest matching destination used in forwarding
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
Interconnecting switches in a campus network
Packets that have been truncated before they were fully received

18. What are the letters used with 10GBASE-X two-letter suffixes to specify the transceiver wavelengths?
275 metres for 62.5 micron MMF; 550 metres for 50 micron MMF
Static access or trunk
Cabling specifications for 10 Gigabit Ethernet
S = Short; L = Long; E = Extra-long

19. What are the basic operations that a frame undergoes as it passes through a Layer 2 switch?
70 km for 9 micron SMF; 100 km for 8 micron SMF
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
Switch(config)#interface {type}{module}/{number}
IEEE 802.3z

20. Disables CEF operation on an interface
Switch(config-if)#no ip route-cache cef
A station must wait its turn to transmit; it can't transmit and receive at the same time
Switch#show interfaces status err-disabled
In TCAM Value entries

21. What is the maximum cabling distance for 1000BASE-SX?
Enable error-disable for all possible causes
275 metres for 62.5 micron MMF; 550 metres for 50 micron MMF
7 100BASE-T2 full duplex; 6 100BASE-TX full duplex; 5 100BASE-T2 half duplex; 4 100BASE-T4; 3 100BASE-TX; 2 10BASE-T full duplex; 1 10BASE-T
The switch port falls back to default setting of half duplex

22. Enables error-disable for Bridge Protocol Data Units (BPDU) received on ports configured for STP PortFast
Switch(config)#default interface {interface}
Switch(config)#errdisable detect cause bpduguard
Switch(config-if)#speed {10 | 100 | 1000 | auto}
Feature Manager (FM) and Switching Database Manager (SDM)

23. What is TCAM?
FIB with adjacency table
Ternary Content-Addressable Memory
The switch port falls back to default setting of half duplex
Institute of Electrical and Electronics Engineers

24. What function is performed by the Feature Manager (FM)?
Static access - trunk - tunnel or dynamic
Cabling specifications for Gigabit Ethernet
With MMF cables shorter than 100 metres (to prevent over-driving the far-end receiver) and with MMF cables longer than 300 metres (to lessen the effect of differential mode delay)
Compiling Access Control Entries (ACE) into the TCAM table

25. Displays CEF adjacency table information
Switch#show adjacency [{interface}] [summary | detail]
From 30 seconds to 86 -400 seconds (24 hours)
300 seconds
The Punt adjacency

26. What are the Fast Ethernet autonegotiation selection priorities?
Switch#show ip cef {interface} [detail]
Switch(config)#errdisable detect cause security-violation
7 100BASE-T2 full duplex; 6 100BASE-TX full duplex; 5 100BASE-T2 half duplex; 4 100BASE-T4; 3 100BASE-TX; 2 10BASE-T full duplex; 1 10BASE-T
The Layer 3 forwarding engine

27. What is the DTP negotiation mode of a switch port configured as static access?
Off
UTP Fast Ethernet and Gigabit Ethernet
GBIC-to-GBIC connection between stacking Catalyst switches or between any two Gigabit switch ports over a short distance
10GBASE-SR/SW - 10GBASE-LR/LW - 10GBASE-ER/EW - 10GBASE-LX4/LW4 - 10GBASE-CX4

28. What is 1000BASE-ZX?
Full duplex
Gigabit Ethernet over 1 pair 8 or 9 micron SMF (1550 nm laser)
Source MAC address; Port of arrival; VLAN; Time stamp
Through exchange of information - which means that for one end to successfully negotiate duplex mode the other end must also be set to autonegotiate

29. Adds a description to an interface configuration
Configure the appropriate values manually on both ends of the link
Switch(config-if)#no ip route-cache cef
Switch(config-if)#description {string}
With MMF cables shorter than 100 metres (to prevent over-driving the far-end receiver) and with MMF cables longer than 300 metres (to lessen the effect of differential mode delay)

30. Enables error-disable when an STP BPDU is received from a root bridge on an unexpected port
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Switch(config-if)#no switchport
Switch(config)#errdisable detect cause rootguard
LC - MT-RJ or RJ-45

31. What is 10GBASE-SR/SW?
Switch(config)#errdisable detect cause unicast-flood
Route caching and topology based
10 Gigabit Ethernet over 50 or 62.5 micron MMF (850 nm serial laser)
Switch(config)#errdisable detect cause dtp-flap

32. What information is recorded in CAM as frames arrive on a switch port?
1 -2 on one end with 3 -6 on the other end
Switch(config)#errdisable recovery interval {seconds}
Static access or dynamic
Source MAC address; Port of arrival; VLAN; Time stamp

33. What is 10GBASE-LR/LW?
Mask bits set to 1 for Value bits of interest and 0 for Value bits that don't matter
10 Gigabit Ethernet over 9 micron SMF (1310 nm serial laser)
Manually by administratively disabling and re-enabling the port
Dynamic

34. Enables error-disable for conditions that trigger unicast flood blocking on a port
Switch(config)#errdisable detect cause unicast-flood
Switch#show interfaces status
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
Listen to the first packet and put its resulting destination in the MLS cache; Route subsequent packets in the same flow based on the MLS cache

35. What changes are made to packets by the CEF packet rewrite engine just before forwarding?
Creating the VLAN
Switch#show cef drop
Layer 2 destination address changed to next-hop MAC address; Layer 2 source address changed to outbound interface MAC address; Layer 3 TTL decremented by 1; Layer 3 IP checksum recalculated; Layer 2 frame checksum recalculated
Switch(config)#errdisable detect cause pagp-flap

36. Displays static CAM table entries
Numeric values that represent what action to take after the TCAM lookup occurs
Switch#show mac address-table static [address {mac-address}] [interface {interface}] [vlan {vlan}]
Source MAC (/48); Destination MAC (/48); Ethertype (/16)
Trunk

37. What is the maximum cabling distance for Fast Ethernet over singlemode fibre?
Full duplex only
10 km
Creating the VLAN
The table of learned MAC addresses - ports - and VLAN information

38. What is 1000BASE-SX?
Collision domain
Gigabit Ethernet over 1 pair 50 or 62.5 micron MMF (850 nm laser)
A proprietary connector with a high-data-rate copper cable with enhanced signal integrity and EMI performance
100 metres

39. What is WWDM?
A proprietary connector with a high-data-rate copper cable with enhanced signal integrity and EMI performance
Wide-Wavelength Division Multiplexing
Trunk
Enable error-disable for all possible causes

40. What is the role of a Route Processor (RP) in first generation MLS?
Process the first packet in a traffic flow to determine the destination
Multilayer Switching
66-300 metres for 50 micron MMF; 33 metres for 62.5 micron MMF
Bundling together two to eight full duplex Fast Ethernet links to act as a single physical link

41. What information is stored in CAM?
Compiling Access Control Entries (ACE) into the TCAM table
The table of learned MAC addresses - ports - and VLAN information
Switch(config)#errdisable detect cause unicast-flood
Half duplex

42. Sets the duplex mode of an Ethernet or Fast Ethernet interface
Dynamic
On
By Mask/Value - where each unique mask has eight value patterns associated with it
Switch(config-if)#duplex {auto | full | half}

43. Enables error-disable when a link is seen to be unidirectional
SC or MT-RJ
Switch(config)#errdisable detect cause udld
S = Short; L = Long; E = Extra-long
UTP Fast Ethernet and Gigabit Ethernet

44. Changes an interface to a layer 3 interface and erases all layer 2 interface configurations
In parallel revealing the best (longest) match in a single table lookup
Forwarding Information Base
Full duplex only
Switch(config-if)#no switchport

45. Enables error-disable for errors when assigning a port to a dynamic VLAN through a VMPS
Slow response times - low throughput - runts and other input errors on the switch ports
Layer 2 destination address changed to next-hop MAC address; Layer 2 source address changed to outbound interface MAC address; Layer 3 TTL decremented by 1; Layer 3 IP checksum recalculated; Layer 2 frame checksum recalculated
Switch(config)#errdisable detect cause vmps
Switch(config)#errdisable detect cause dhcp-rate-limit

46. What packets are immediately sent to the CEF Layer 3 engine for further processing?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

47. What is the administrative mode of a switch port that carries transparent Layer 2 VPNs?
Switch#clear mac address-table [dynamic] [address {mac-address}] [interface {interface}] [vlan {vlan}]
Tunnel
Full duplex
Switch(config)#errdisable detect cause dtp-flap

48. Enables error-disable for errors with offering inline power
Electromagnetic Interference
10 Gigabit Ethernet over copper CX4 with Infiniband connectors
Switch(config)#errdisable detect cause ilpower
Content-Addressable Memory

49. What is the TCAM Value and Mask for an IP access list?
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8)
Numeric values that represent what action to take after the TCAM lookup occurs
Switch(config-if)#description {string}
CEF punt

50. What is the name of a Layer 3 physical interface on a switch?
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX
Creating the VLAN
When one station transmits at the same time as another on a shared medium
Native routed interface