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 are the Gigabit Ethernet autonegotiation selection priorities?
Switch(config)#mac address-table aging-time {seconds}
1000BASE-T full duplex followed by 1000BASE-T half duplex
Switch#show errdisable detect
Switch#show errdisable recovery

2. Sets the speed of a Fast Ethernet or Gigabit Ethernet interface
10GbE operates only at full duplex
Forwarding Information Base
Switch(config-if)#speed {10 | 100 | 1000 | auto}
Native routed interface

3. How are ports that are in error-disable state re-enabled by default?
Switch(config)#errdisable detect cause security-violation
Manually by administratively disabling and re-enabling the port
Ingress queueing; Destination MAC lookup (CAM); Destination IP lookup (FIB); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Layer 3 packet rewrite; Egress queueing
Switch#show adjacency [{interface}] [summary | detail]

4. What is the default timer for automatic re-enabling of error-disabled ports?
The switch port falls back to default setting of half duplex
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
GBIC-to-GBIC connection between stacking Catalyst switches or between any two Gigabit switch ports over a short distance
300 seconds

5. What are the common cabling specifications for Fast Ethernet?
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 Discard adjacency
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX
Enable error-disable for all possible causes

6. What are the letters used with 10GBASE-X two-letter suffixes to specify the transceiver wavelengths?
A name assigned to a ranges of interfaces
Switch(config)#errdisable recovery cause {all | {cause-name}}
S = Short; L = Long; E = Extra-long
Switch(config)#errdisable detect cause dtp-flap

7. What is the maximum cabling distance for Ethernet - Fast Ethernet and Gigabit Ethernet over UTP cabling?
Bundling together two to eight full duplex Fast Ethernet links to act as a single physical link
Multilayer Switching
300 seconds
100 metres

8. Enables error-disable for Bridge Protocol Data Units (BPDU) received on ports configured for STP PortFast
SVI
The adjacency table
Switch(config)#errdisable detect cause bpduguard
Numeric values that represent what action to take after the TCAM lookup occurs

9. What are the operational modes of a Layer 2 switched interface?
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
Switch(config)#default interface {interface}
The Layer 3 engine
Down - static access - trunk or tunnel

10. What are the names of CEF optimisation techniques using specialised forwarding hardware?
Accelerated CEF (aCEF) and Distributed CEF (dCEF)
Full duplex
Switch(config)#errdisable detect cause security-violation
Switch(config)#mac address-table static {mac-address} vlan {vlan} interface {interface}

11. What are the basic operations that a frame undergoes as it passes through a multilayer switch?
Ingress queueing; Destination MAC lookup (CAM); Destination IP lookup (FIB); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Layer 3 packet rewrite; Egress queueing
Switch(config)#errdisable detect cause ilpower
Mask bits set to 1 for Value bits of interest and 0 for Value bits that don't matter
Flooding a frame with unknown destination MAC address out all ports assigned to the source port VLAN except the source port itself

12. Displays error-disabled recovery timer information
Switch#show errdisable recovery
When one station transmits at the same time as another on a shared medium
Switch(config)#errdisable recovery interval {seconds}
Switch#show interfaces status

13. What are the names of the two basic generations of MLS?
10GBASE-SR/SW - 10GBASE-LR/LW - 10GBASE-ER/EW - 10GBASE-LX4/LW4 - 10GBASE-CX4
400 metres half duplex and 2000 metres full duplex
Ternary Content-Addressable Memory
Route caching and topology based

14. Specifies the timer for automatic re-enabling of error-disabled ports
Switch(config)#errdisable recovery interval {seconds}
UTP Fast Ethernet and Gigabit Ethernet
Configure the appropriate values manually on both ends of the link
Switch(config)#errdisable detect cause loopback

15. What is the maximum cabling distance for 1000BASE-LX/LH?
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Tunnel
American National Standards Institute
XENPAK - X2 - or SFP+

16. What is the default duplex mode of a 10 Mbps Ethernet interface?
Half duplex
Native routed interface
Source IP (/32) - Destination IP (/32) - Protocol (/16) - IP ToS (/8) - Source port (/16) - Source operator (/4) - Destination port (/16) - Destination operator (/4)
Switch(config)#interface range {type}{module}/{number} [- {number}] [ - {type}{module}/{number} ...]

17. What is a ternary combination?

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

18. What happens to subsequent packets destined for FIB entries in CEF glean state?
LC - MT-RJ or RJ-45
Adjacent MAC address (6 octets); Layer 3 engine MAC address (6 octets); EtherType (2 octets)
Partition and tune the TCAM on some Catalyst switches into areas for different functions
They are dropped (ARP throttling)

19. What portion of the FIB contains the Layer 3 next-hop addresses for each entry together with the corresponding Layer 2 information?
Switch(config)#interface {type}{module}/{number}
LC - MT-RJ or RJ-45
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
The adjacency table

20. What is LOU?
Gigabit Ethernet over 1 pair Shielded Twisted Pair (STP) cabling
Logical Operation Unit
66-300 metres for 50 micron MMF; 33 metres for 62.5 micron MMF
Switch#show mac address-table static [address {mac-address}] [interface {interface}] [vlan {vlan}]

21. Configures a switch port with a static access VLAN assignment
LAN PHY and WAN PHY
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
Ternary Content-Addressable Memory
Switch(config-if)#switchport access vlan {vlan}

22. What are the default error-disable detection causes?
Switch(config)#errdisable detect cause dtp-flap
Half duplex
Enable error-disable for all possible causes
Switch#show cef not-cef-switched

23. What are the symptoms of a duplex setting mismatch between two ends of a link?
The Drop adjacency
Slow response times - low throughput - runts and other input errors on the switch ports
Trunk or dynamic
Switch#show cef drop

24. When can a switch start to learn source MAC addresses on incoming ports?
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8); IGMP message type (/8)
Routing table and ARP table
10 Gigabit Ethernet over 9 micron SMF (1550 nm serial laser)
When the Spanning Tree Protocol (STP) has put the switch port in learning or forwarding state

25. What is the content of TCAM Result entries?
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX
Numeric values that represent what action to take after the TCAM lookup occurs
Only temporarily for debugging purposes
300 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF

26. Enables error-disable when trunking encapsulation is flapping from one type to another
The Punt adjacency
Switch(config)#errdisable detect cause dtp-flap
Switch(config)#errdisable detect cause storm-control
Switch(config)#errdisable detect cause dhcp-rate-limit

27. What denotes the number of times the CEF table has been flushed and regenerated as a whole?
Switch#show mac address-table [address {mac-address}] [interface {interface}] [vlan {vlan}]
Cisco Express Forwarding
Layer 2 source and destination MAC addresses; Layer 3 Time-To-Live (TTL) value and header checksum
The CEF epoch number

28. Enables error-disable for the presence of invalid GBIC or SFP modules
From 30 seconds to 86 -400 seconds (24 hours)
R = LAN PHY; W = WAN PHY
Cabling specification for 10 Mbps Ethernet over Unshielded Twisted Pair (UTP) cabling
Switch(config)#errdisable detect cause gbic-invalid

29. What is the maximum cabling distance for 10GBASE-CX4?
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Interconnecting switches in a campus network
15 metres
Only temporarily for debugging purposes

30. What is ANSI?
The switch port falls back to default setting of half duplex
American National Standards Institute
Creating the VLAN
Half duplex

31. What is the TCAM Value and Mask for an Ethernet access list?
Configure the appropriate values manually on both ends of the link
CEF punt
Source MAC (/48); Destination MAC (/48); Ethertype (/16)
IEEE 802.3ab

32. What function is performed by the Feature Manager (FM)?
Compiling Access Control Entries (ACE) into the TCAM table
Switch(config)#errdisable detect cause dhcp-rate-limit
IEEE 802.3ab
Tunnel

33. What are the classes of Physical Media Dependent (PMD) interfaces defined by IEEE 802.3ae?
LC - MT-RJ or RJ-45
LAN PHY and WAN PHY
A proprietary connector with a high-data-rate copper cable with enhanced signal integrity and EMI performance
Switch#show cef not-cef-switched

34. What is WWDM?
Switch#show mac address-table dynamic [address {mac-address}] [interface {interface}] [vlan {vlan}]
By electrical signalling so that either end of a link can determine what speed the other end is trying to use
Switch#show interfaces {interface}
Wide-Wavelength Division Multiplexing

35. Displays CEF Punt statistics with number of packets and reason for each line card
Ternary Content-Addressable Memory
Switch#show cef not-cef-switched
Switch(config-if)#switchport access vlan {vlan}
Dynamic

36. Enables error-disable detection
The Null adjacency
Switch(config)#errdisable detect cause {all | {cause-name}}
Partition and tune the TCAM on some Catalyst switches into areas for different functions
By Mask/Value - where each unique mask has eight value patterns associated with it

37. What Ethernet ports allow for autonegotiation?
UTP Fast Ethernet and Gigabit Ethernet
Switch#show ip cef
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
10 km

38. What is LAN PHY used for?
Configure the appropriate values manually on both ends of the link
Switch(config)#errdisable recovery cause {all | {cause-name}}
Interconnecting switches in a campus network
Switch(config)#errdisable detect cause storm-control

39. What are the reasons for packets being dropped by CEF?
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error
Half duplex
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
A proprietary connector with a high-data-rate copper cable with enhanced signal integrity and EMI performance

40. What is IEEE?
Institute of Electrical and Electronics Engineers
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error
Manually by administratively disabling and re-enabling the port
Process the first packet in a traffic flow to determine the destination

41. What is the TCAM Value and Mask for an extended IP access list using TCP/UDP?
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
Switch(config)#errdisable recovery cause {all | {cause-name}}
Source IP (/32) - Destination IP (/32) - Protocol (/16) - IP ToS (/8) - Source port (/16) - Source operator (/4) - Destination port (/16) - Destination operator (/4)
Tunnel

42. How does the IEEE 802.3ae standard differ from its predecessors at the physical layer?
10GbE operates only at full duplex
Switch#show errdisable detect
Switch(config)#interface vlan {vlan-id}
66-300 metres for 50 micron MMF; 33 metres for 62.5 micron MMF

43. What is 1000BASE-SX?
Gigabit Interface Converter (GBIC) or Small Form factor Pluggable (SFP)
Switch(config)#mac address-table aging-time {seconds}
Gigabit Ethernet over 1 pair 50 or 62.5 micron MMF (850 nm laser)
Collision domain

44. What are the 100BASE-FX connectors used in Cisco Catalyst switches?
Switch#show mac address-table [address {mac-address}] [interface {interface}] [vlan {vlan}]
UTP Fast Ethernet and Gigabit Ethernet
SC or MT-RJ
IEEE 802.3ae

45. Creates a switched virtual interface (SVI) and enters interface configuration mode
Carrier Sense Multiple Access Collision Detection
Switch#show cef drop
Switch#show mac address-table count [address {mac-address}] [interface {interface}] [vlan {vlan}]
Switch(config)#interface vlan {vlan-id}

46. What connectors can be used with SFP modules?
Switch(config-if)#no ip route-cache cef
Switch#show mac address-table static [address {mac-address}] [interface {interface}] [vlan {vlan}]
LC - MT-RJ or RJ-45
Switch#show running-config interface {interface}

47. What is CSMA/CD?
Accelerated CEF (aCEF)
Carrier Sense Multiple Access Collision Detection
Gigabit Interface Converter (GBIC) or Small Form factor Pluggable (SFP)
Route caching and topology based

48. What are the 1000BASE-X transceiver module form factors used in Cisco Catalyst switches?
American National Standards Institute
Collision domain
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
Gigabit Interface Converter (GBIC) or Small Form factor Pluggable (SFP)

49. What are the common PMD types for 10 Gigabit Ethernet?
CEF punt
Logical Operation Unit
Value - Mask - and Result (VMR)
10GBASE-SR/SW - 10GBASE-LR/LW - 10GBASE-ER/EW - 10GBASE-LX4/LW4 - 10GBASE-CX4

50. What technology was merged into the IEEE 802.3 Ethernet standard to create Gigabit Ethernet?
Configure the appropriate values manually on both ends of the link
By Mask/Value - where each unique mask has eight value patterns associated with it
ANSI X3T11 FibreChannel
Source MAC (/48); Destination MAC (/48); Ethertype (/16)