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Industrial Ethernet Quiz

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What are the following standards associated with?

1. 802.3ab
2. 802.3ae
3. 802.3af
4. 802.3an

The answers are as follows:

1. 1000BASE-T
2. 10 Gbit/s over fibre
3. Power over Ethernet
4. 10GBASE-T

What is the ‘max age’ timer in Spanning Tree Protocol?

The answer is:

The period of time that a non root bridge will wait for a BPDU from the current root bridge, before it starts a new root bridge election.

What is the multicast address used to identify all multicast capable hosts?

The answer is:

224.0.0.1

How much power does POE 802.1af provide a POE switch provide on each port to connected devices?

The answer is:

15.4 Watts per port.

What do the AES/TKIP Wireless encryption protocols stand for, and which is strongest?

The answers are:

TKIP Temporal Key Integrity Protocol is weaker than AES Advanced Encryption Standard which requires more powerful hardware to support it.

What are the three private address blocks for IPv4?

The answers are:

  • 10.0.0.0 – 10.255.255.255 Class A Block
  • 172.16.0.0 – 172.31.255.255 Class B Block
  • 192.168.0.0 – 192.168.255.255 Class C Block

What are the difference between RIP versions 1 & 2?

The answer is:

  • Version 2 uses multicast updates rather than broadcast updates.
  • Version 2 adds router authentication to prevent route poisoning.
  • Version 2 supports VLSM (Variable Length Subnet Masking).

What is the name of the algorithm used by the OSPF routing protocol?

The answer is: The Dijkstra's algorithm, also called the shortest path first algorithm.

In the BRI version ISDN what are the speeds of the bearer 'B' channels and signalling 'D' channel?

The answer is: 'B' Channels run at 64Kbps and 'D' Channel runs at 16Kbps

What does CSU/DSU stand for, and what is it used for?

The answer is: Channel Service Unit/Data Service Unit is an interface used to connect a router to a Telecoms circuit such as a E1/T1 line, and provides the clocking signal for the router.

In the 1983 movie 'War Games' with Matthew Broderick, what was the password used to break into the military network?

As a bonus question relating to the same film, what is the name of the computer hacking technique used to locate a computer network accessed via a modem connection?

The answer is: The password was Joshua & the hacking technique is called War Dialling.

Identify the application used by the TCP ports below:

1. 21
2. 25
3. 69
4. 80
5. 161

The answers are:

1. FTP
2. SMTP
3. TFTP
4. HTTP
5. SNMP

What is the difference between a switch and a hub?

1. Physically a switch is a star topology and a hub is a bus

2. Logically a switch is a star topology and a hub is a bus

3. Logically a switch is a bus topology and a hub is a star

4. Physically a switch is a star topology and a hub is a ring

The answer is: 2. Physically both devices are a star topology but the switch is logically a star whereas a hub is logically a bus.

What is the binary word?

01000111 01100001 01110010 01110010 01100101 01110100 01110100 01000011 01101111 01101101

The answer is: GARRETTCOM

What is the frame called which is used by STP and RSTP?

1. BPDU (Bridge Protocol Data Unit)

2. RPDU (Redundancy Protocol Data Unit

3. TCIP (Topology Change Information Packet)

4. LPIS (Loop Prevention Information Sender)

The answer is: BPDU (Bridge Protocol Data Unit)

What is the address space of Internet Protocol Version 6 (IPv6)?

1. 264
2. 2128
3. 2256
4. 2512

The answer is: 2128

What are the following standards associated with?

1. 802.3ab
2. 802.3ae
3. 802.3af
4. 802.3an

The answers are as follows:

1. 1000BASE-T
2. 10 Gbit/s over fibre
3. Power over Ethernet
4. 10GBASE-T

When was Ethernet orignally developed?

The answer is -Ethernet was originally developed at Xerox PARC in 1973–1975.

What happens if you plug a non - 802.3af (Power over Ethernet) device into switch that provides 802.3af ?

1. It will erupt into smoke and flames.
2. It will blow a fuse.
3. No damage but the Ethernet won’t work.
4. It will work as usual.

The answer is - It will work as usual.

What does RSTP use in order to notify other devices that a topology change has occured?

1. CPDU
2. BPDU
3. C3PO
4. 3PDU

The answer is BPDU - Bridge Protocol Data Unit

Find out more information on BPDUs

What is the maximum distance capable using multimode gigabit fibre?

1. 100m
2. 550m
3. 2Km

The answer is 2Km - Using FX on 1300nM Multimode

In the context of substation networking... What does GOOSE stand for?

GENERIC OBJECT ORIENTATED SUBSTATION EVENTS

Which of the following are correct fibre connector types?

A. DC
B. MTRJ
C. SC
D. ST
E. AC
F. MC

The answers are B: MTRJ, C. SC and D. ST.

Which is not an IPSec encryption algorithm?

A: DES
B: 3DES
C: SHA
D: AES

The answer is C: SHA.

SHA (Secure Hash Algorithm) designed by the NSA is used as a cryptographic hash function to an encryption algorithm such as IPSec.