                                Ethernet Implementation and Problem
                                Determination 
                                Test 008


TEST INFORMATION:

- Elective for Certified LAN Server Engineer
- Number of questions:  76/77
- Passing % Score:      65
- Length (in minutes):  60


PREPARATION:

-  IBM Courses

V5013              Ethernet Implementation and Problem Determination











































                                Ethernet Implementation and Problem
                                Determination
                                Test 008 Objectives
                                Version 2

SECTION 1 -  CSMD/CS LANS

-    Explain how the CSMA/CD access method allows multiple stations to
      share the use of a common medium.
-    Describe the collision detection and resolution procedures associated
      with the CSMA/CD access method.
-    Define the term 'slot time' and state its relationship to the maximum
      physical network configuration.
-    State the size and purpose of each field in the MAC frames per the
      IEEE 802.3 standard.
-    Identify the differences between the IEEE 802.3 and Ethernet DIX V2
      MAC frames and identify any interoperability issues.
-    Define the term 'collision domain.'
-    Identify the signal encoding technique used on Ethernet LANs.

SECTION 2 -  CABLE CHARACTERISTICS

-    Briefly describe the following cable characteristics (properties) and
      identify the importance of each as it relates to Ethernet physical
      network design, installation, and/or operation.
     -    DC resistance
     -    Attenuation
     -    Characteristic impedance
     -    Crosstalk
     -    Propagation delay
     -    Capacitance
-    Briefly describe the following media types as they relate to use on
      Ethernet LANs:
     -    COAX
     -    Unshielded Twisted Pair (UTP)
     -    Shielded Twisted Pair (STP)
-    State the significance of the EIA-TIA 568 standard and related TSBS
      relative to Ethernet network planning.

SECTION 3 - THE IEEE 802.3 PHYSICAL LAYER

-    State the function of the following components as described in the
      IEEE 802.3 standards:
     -    DTE
     -    AUT
     -    MAU
     -    MDI
     -    Medium
-    State the function of the following components as described in the
      Ethernet DIX V2 standards:
     -    Transceiver
     -    Transceiver cable
-    Define the following segment types:
     -    Trunk
     -    COAX
     -    LINK
     -    IRL
-    For each of the three IEEE 802.3 physical standards,
     -    10BASE5
     -    10BASE2
     -    10BASE-T,
     identify the following:
     -    Media type
     -    Maximum segment length
     -    Number of physical attachments allowed per segment
     -    Method of DTE attachment to the cable
     -    Cable termination requirement
     -    Cable grounding requirements
     -    DTE interface
-    Identify the purpose of the circuits in the AUI cable.
-    Identify the operational differences between the IEEE 802.3 MAU/AUI
      interface and the Ethernet V2 transceiver and cable.

SECTION 4 - REPEATERS AND MULTI-SEGMENT INSTALLATION

-    State the purpose of a repeater and identify when a repeater is
      required in an Ethernet network.
-    Identify the correct placement of repeaters in an Ethernet network.
-    Identify the rules that need to be observed when interconnecting
      multiple segments within a single Ethernet collision domain.
-    Identify valid and invalid multi-segment configurations.

SECTION 5 - USING FIBER OPTIC CABLE

-    Briefly describe the following terms as they relate to fiber optic cable:
     -    Core
     -    Cladding
     -    Multi-mode
     -    Single mode
-    Identify the size of the fiber optic cable most often used for LANs in the U.S.
-    State the allowable maximum lengths for a FOIRL in both a maximum
      configuration and a smaller configuration.

SECTION 6 - PLANNING OVERVIEW

-    Identify the physical components needed to support the connection of a
      station to an Ethernet network using the following implementations:
     -    10BASE5
     -    10BASE2
     -    10BASE-T
-    Identify key design considerations associated with each of the
      following implementations:
     -    10BASE5
     -    10BASE2
     -    10BASE-T
-    Given a physical network configuration and the delay characteristics
      of each component, calculate the round trip delay and state whetheror
      not it is within the allowable limits.

SECTION 7 - TOOLS

-    List the three types of tools that can be used to test copper cable
      and identify what cable specifications can be determined using each tool type.
-    Briefly explain the principles of TDR and state how TDR-based tools
      can be used to locate and identify certain cable faults or impairments.
-    List two types of tools that can be used to test fiber optic cable.
-    Explain how LAN analyzers can be used to isolate and identify problems
      and faults in an Ethernet network.
-    Use the appropriate tool to perform PD/PSI on connection problems
      caused by select UTP and COAX media failures.

SECTION 8 - PC NETWORK

-    Explain how IBM PC network differs from the IEEE 802.3 standard.
-    Describe the components necessary to connect a DTE to an IBM PC network LAN.
-    Recognize a valid LAN configuration for IBM PC network baseband.
-    Verify correct operation of the PC network baseband LAN using the
      advanced diagnostics.

SECTION 9 - INTRODUCTION TO TCP/IP

-    Identify and describe the four layers of TCP/IP protocol suite.
-    List and describe the commonly used protocols contained with TCP/IP
      protocol suite.
-    Differentiate between connection-oriented and connectionless-oriented
      communications.

SECTION 10 - ADDRESSING AND NAMING

-    Given an Internet address for a host, identify the class, network, and
      HOSTID address of the host.
-    Describe the function of the following APPLs: TELNET, PING, Domain
      Server and Netwatch.
-    Define the purpose of subnetting.
-    Identify sequence of steps for sending Datagrams on the network from
      any host.
-    Describe and define the function of each: ARP table, Route table, and
      hosts file.

SECTION 11 - ROUTING

-    Define the function of a TCP/IP router.
-    Describe the operation of a TCP/IP router.
-    Perform problem determination procedures for TCP/IP connection
      failures caused by:
     -    Physical connectivity problems
     -    Local host software configuration problems
     -    Routing configuration problems



                                Ethernet Implementation and Problem
                                Determination
                                Sample Test 008
                                Version 2

SECTION 1 - CSMA/CD LANS

1. Which statement about multiple access, as it refers to CSMA/CD networks, is true?

a.  All stations are attached to a common collision domain.
b.  A station can have multiple attachments to different LANs.
c.  A station can have multiple attachments to the same cable.
d.  Stations attached to the same LAN can be separated by
     bridges, but not by routers.

2. Once a collision has been detected, the station will continue to
transmit for ________ bits before backing off.

a.  0
b.  8
c.  16
d.  32

3. Which information could be found in an IEEE 802.3 Media Access Control
(MAC) frame SOURCE ADDRESS field?

a.  10005a123456
b.  4000762930
c.  C0000800001243
d.  FFFFFFFFFFFF

4. Which component uses Manchester encoding to perform its function?

a.  medium
b.  Media Attachment Unit (MAU)
c.  Media Dependent Interface (MDI)
d.  Attachment Unit Interface (AUI)

SECTION 2 - CABLE CHARACTERISTICS

5. Which cable characteristics limit the length of cable that can be used
in an Ethernet network?

a.  crosstalk
b.  attenuation
c.  capacitance
d.  propagation delay
e.  characteristic impedance

6. What problem could result if the value of the terminator used on an
Ethernet segment does not match the characteristic impedance of the cable?

a.  Data could be received multiple times.
b.  The signal could be distorted due to NEXT.
c.  Some termination would eliminate any problems.
d.  The signal could be distorted due to reflections.

7. What is the characteristic impedance of coaxial Ethernet broadband cabling?

a.  50 ohms
b.  75 ohms
c.  93 ohms
d.  100 ohms

SECTION 3 - THE IEEE 802.3 PHYSICAL LAYER

8. Which component is a network station or network node?

a.  Media Attachment Unit (MAU)
b.  Data Terminal Equipment (DTE)
c.  Attachment Unit Interface (AUI)
d.  Media Dependent Interface (MDI)

9. Which types of segments are considered to be unpopulated, except for a
Media Attachment Unit (MAU) at both ends of the segment?

a.  IRL segments
b.  coax segments
c.  link segments
d.  trunk segments

10. What is the maximum distance between the 10BASE2 coax bus and the
station Media Dependent Interface (MDI)?

a.  0.4 centimeters
b.  4.0 centimeters
c.  0.4 meters
d.  4.0 meters

11. The DTE interface for connection to a 10BASE5 network is typically
________ connector.

a.  an N
b.  a BNC
c.  an RJ45
d.  an Attachment Unit Interface (AUI)

12. There can be no more than ________ physical attachments on a 10BASE-T
segment.

a.  2
b.  30
c.  72
d.  100

SECTION 4 - REPEATERS AND MULTI-SEGMENT INSTALLATION

13. What is the maximum number of repeaters allowed between any two Data
Terminal Equipment (DTE)s in one collision domain?

a.  2
b.  4
c.  1022
d.  greater than 4, but less than 1022

14. Where is a 10BASE2 repeater attached to a link segment?

a.  at the cable ends
b.  at any marked location
c.  in the middle of the cable segment
d.  where a supplied Attachment Unit Interface (AUI) is present

15. What is the maximum distance between any two Data Terminal Equipment
(DTE)s in a collision domain, when using thin Ethernet cable?

a.  50 meters
b.  185 meters
c.  500 meters
d.  925 meters

16. The path through the network between two Data Terminal Equipment
(DTE)s consists of
   1)  a 10BASE2 coax segment            2)  repeater
   3)  a 10BASE5 coax segment            4)  repeater
   5)  a 10BASE5 coax segment            6)  repeater
   7)  a 10BASE2 coax segment
Which, if any, of the rules for multi-segment configurations does
this configuration break?

a.  the maximum number of segments between two Data Terminal Equipment (DTE)s
b.  the maximum number of repeaters between two Data Terminal Equipment (DTE)s
c.  the maximum number of coax segments between two Data Terminal Equipment (DTE)s
d.  none of the rules

17. When the connection between two DTEs was traced, it was found to contain the
following sequence of components.  Which component is out of specifications?

a.  40 meters of Attachment Unit Interface (AUI) cable
b.  500 meters of 10BASE5 coax
c.  20 meters of Attachment Unit Interface (AUI) cable
d.  repeater
e.  100 meters of 10BASE2 coax
f.  repeater
g.  20 meters of Attachment Unit Interface (AUI) cable
h.  500 meters of 10BASE5 coax
i.  40 meters of Attachment Unit Interface (AUI) cable

SECTION 5 - USING FIBER OPTIC CABLE

18. What is the maximum allowable length for a FOIRL?

a.  500 meters
b.  1000 meters
c.  2000 meters
d.  either 500 or 1000 meters, depending upon total configuration

SECTION 6 - PLANNING OVERVIEW

19. Which components would you need to attach a NIC with an Attachment
Unit Interface (AUI) connector to a 10BASE-T network?

a.  an Attachment Unit Interface (AUI)
b.  a Media Attachment Unit (MAU) with an N connector
c.  a Media Attachment Unit (MAU) with a BNC connector
d.  a Media Attachment Unit (MAU) with a RJ45 connector
e.  a balun to convert the coax interface to twisted-pair

20. Which components would you need to attach a Data Terminal Equipment
(DTE) that contains a NIC with an RJ45 connector to a 10BASE2 network?

a.  a NIC with a BNC connector
b.  an Attachment Unit Interface (AUI)
c.  a Media Attachment Unit (MAU) with a BNC connector
d.  a balun to convert the coax interface to twisted-pair
e.  a patch cable with an RJ45 on one end and a BNC on the other

21. Which list of components would accommodate the connection of 50 Media
Attachment Units (MAUs) that span a distance of 500 meters?

a.  one 10BASE5 coax segment
b.  two 10BASE2 coax segments and one repeater
c.  sixty 10BASE-T segments and two 30-port concentrators
d.  one 10BASE2 coax segment, 10BASE-T segments, and a 24-port concentrator

22. A DTE cannot be located close enough to the ThinNet cable to make a
connection. Its NIC has an Attachment Unit Interface (AUI) and a BNC
interface. What is a possible solution for this connection problem?

a.  Option the NIC for internal transceiver, and use a 10BASE2
     coax to reach the T-connector.
b.  Option the NIC for external transceiver, and use a 10BASE2
     coax to reach the T-connector.
c.  Option the NIC for internal transceiver, and use an Attachment
     Unit Interface (AUI) cable and a 10BASE2 Media Attachment Unit
     (MAU) to reach the T-connector.
d.  Option the NIC for external transceiver, and use an Attachment
     Unit Interface (AUI) cable and a 10BASE2 Media Attachment Unit
     (MAU) to reach the T-connector.

SECTION 7 - TOOLS

23. What would you use to verify correct termination of a 10BASE5
segment?

a.  a signal tracer and listening for a tone
b.  a Volt Ohm Meter (VOM) AC voltage setting
c.  a Volt Ohm Meter (VOM) DC voltage setting
d.  a Volt Ohm Meter (VOM) DC resistance setting

24. Which problem might require a LAN analyzer to resolve?

a.  an open in a cable segment
b.  cable that is not terminated
c.  NIC adapter diagnostic failure
d.  poor response time on the network

SECTION 8 - PC NETWORK

25. Where should terminators be installed in a PC Network Baseband network using a
single 5173 with eight DTEs attached to each IN port on the 5173?

a.  one terminator in the OUT port on the 5173
b.  a terminator at the last device on each string that is
     attached to an IN port
c.  no termination is needed; a wrap plug is required at the end
     DTE on each string
d.  one terminator at the last device attached to one of the
     strings of eight DTEs on the IN ports

26. What is the proper card setup for running PC Network Advanced
Diagnostics on a DTE that is not connected to the network?

a.  one wrap plug in both connectors
b.  no plugs installed in either connector
c.  one terminator plug in both connectors
d.  one wrap plug and one terminator plug in each connector

SECTION 9 - INTRODUCTION TO THE INTERNET AND TCP/IP

27. Which protocol is used to route datagrams through the networks?

a.  IP
b.  TCP
c.  Address Resolution Protocol (ARP)
d.  Reverse Address Resolution Protocol (RARP)

28. Which service provides reliable and sequential transfer?

a.  internet service
b.  transport service
c.  connectionless service
d.  connection-oriented service

SECTION 10 - ADDRESSING AND NAMING

29. What is the NETID portion of the internet address 128.12.13.1?

a.  128.
b.  128.12
c.  128.12.13
d.  13.1

30. Which application provides translation between high-level machine
names and the IP address?

a.  PING
b.  TELNET
c.  NETWATCH
d.  Domain Name System

31. What will the router do when the results of the routing algorithm is
equal to its local IP address?

a.  The router will deliver the packet directly.
b.  The router will send the packet to the default router.
c.  The router will access an Address Resolution Protocol (ARP)
     cache to identify the UAA.
d.  The router will send an Address Resolution Protocol (ARP)
     broadcast.

32. Where would you find the following entry?
   [128.12.63.6  wkst6]

a.  in the route table
b.  in an etc\hosts file
c.  in the default router
d.  in an Address Resolution Protocol (ARP) table

SECTION 11 - ROUTING

33. Which protocol will TELNET use to route through the network?

a.  IPX
b.  SNA
c.  TCP/IP
d.  NETBIOS

34. When a router receives a packet, what determines that the packet is
destined for a local host?

a.  the routing table
b.  the etc\hosts file
c.  the IP address and subnet mask
d.  the Address Resolution Protocol (ARP) table

35. You receive a "no route to host" response message to an attempt to
PING address 128.12.47.1.  The router's internet address and mask for
the NIC on the segment to which you are attached are 128.12.63.201 and
255.255.240.0 respectively.  Your workstation's internet address,
mask, and default router are 128.12.64.9, 255.255.240.0, and
128.12.63.201 respectively.  Which workstation address (if any) could
you change to resolve the problem?

a.  mask
b.  default router
c.  internet address
d.  no workstation address change


ANSWER KEY

1.  a                                                          23.  d

2.  d                                                          24.  d

3.  a                                                          25.  b

4.  b                                                          26.  d

5.  bd                                                         27.  a

6.  d                                                          28.  d

7.  b                                                          29.  b

8.  b                                                          30.  d

9.  ac                                                         31.  c

10.  b                                                         32.  b

11.  d                                                         33.  c

12.  a                                                         34.  c

13.  b                                                         35.  c

14.  a

15.  d

16.  c

17.  e

18.  d

19.  ad

20.  a

21.  a

22.  d

