Written Exam Analyzed

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Written ExamAnalyzed
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• Easy Questions Recognize Concepts
• Difficult Questions Apply Concepts

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File Permissions
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Permissions

• Permissions automatic when folder first created.
• Then changed manually.

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Permission Complexities

• NTFS and Share
• Folders have sub-folders.
• People belong to multiple groups.
• Molecular and atomic permissions.
• Files and folders are not the same.
• Move and copy files/folders
• Change ownership

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Complication 1

• NTFS permission (security tab)
• Share permission (sharing tab)
• Share NTFS separate from AD.
• Encryption acts like a third permission.

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Where

• Go to Folder and File Properties
• NTFS on Security tab.
• Sharing on Sharing tab.

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Share NTFS

• Share permission applies to network access but
  not someone logged on locally.
• NTFS applies to everyone and all the time.

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• Between share NTFS, most restrictive apply.

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• Everyone has Shared Full Control of Folder A.
• Sales has Read Only NTFS access to Folder A.
• I am a member of Everyone and Sales.
• I have Read Only access to Folder A.

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Complexity 2

• Folders have sub-folders.
• Permissions can be inherited.

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Sub-Folder Inheritance

• Grayed out means inherited permission.
• Deny at level 1 causes level 2 deny unless
  explicit allow at level 2.
• When different permissions, closest parent
  sub-folder prevails.

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Complexity 3

• People belong to multiple groups.
• Each group has different permissions.
• Results in Effective permission.

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• Joe is member of Managers Sales.
• NTFS Salary Plan folder Sales deny Managers
  read.
• Joe cannot access since one deny.

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• Joe is member of Sales and Purchasing groups and
  not member of Vendors group.
• NTFS Sales Plan folder Sales read-only
  Purchasing blank Vendors denied read.
• Joe can read since he is in Sales and not in
  Vendors.

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Effective PermissionsTreat NTFS Share
separately

• If only one permission to one group
• If allow, user can access object.
• If blank/deny, user cannot access object.
• If multiple permissions to different groups
• If Allow and no Deny, permission granted.
• If one Deny checked, permission denied.

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Multiple Groups w Share NTFS

• Between NTFS Least restrictive apply
• Between Share Least restrictive apply
• Between NTFS and Share effective permissions
  Most restrictive apply.
• Deny overrides Allow.

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Complexity 4

• Molecular permissions
• Atomic permissions
• See Table 6.2.

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When Allow Overlaps Deny

• Full includes both read and append data.
• I am in group A and group B.
• Group A given full control.
• Group B denied append control.
• I still have read access.

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Complexity 5

• Files folders not the same.
• Execute file vs. Traverse folder
• Traverse If locked at level1 but full control
  at level 2, traverse access lets you hop over
  level 1 lock.

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Complexity 6

• What happens to permission when file or folder
  moved or copied?

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Complexity 7

• Change ownership of files/folders

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Permission Complexities

• NTFS and Share
• Folders have sub-folders.
• People belong to multiple groups.
• Molecular and atomic permissions.
• Files and folders are not the same.
• Move and copy files/folders
• Change ownership

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Transmission Characteristics
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Transmission Types

• Analog, Digital
• Unicast, Broadcast, Multicast
• Unidirectional, Bidirectional
• Simplex, Half-Duplex, Full Duplex
• Baseband, Broadband
• Parallel, Serial
• Balance, Unbalanced
• Synchronous, Asynchronous

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Wired Ethernet LAN

• Digital, Bidirectional, Asynchronous
• Hub broadcasts. Router unicasts.
• 10BaseT half-duplex/100BaseTX full duplex.
• 1000BaseTX parallel. 100BaseTX serial.

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Wireless LAN

• Digital, Bidirectional, Asynchronous
• Serial
• Half-duplex (according to references)
• Broadband
• Unicast / Broadcast not applicable.

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WAN Transmissions

• Analog and Digital
• Bidirectional
• Unicast
• Serial at customer termination.
• Mostly Broadband (especially at center of
  network)
• Mostly Synchronous

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Encapsulation
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Fig. 5.7
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Network Type
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5/4/3 Rule 2 Nodes Separated by Max of 4 Hubs
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Partition
Bridge
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Either Trunking Or Backbone
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Server Farm
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A Secure Firewall B Web Server C Less
Secure Firewall
C
A
B
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OSI Model
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WAN
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Physical Characteristics
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Low-Level Protocols

• Token Ring
• 10Base 2, 10Base 5
• 10, 100, 1000BaseTX
• 1000BaseSX LX
• 803.11b, 803.11g

• POTS
• ADSL
• ISDN BRI
• T1
• Frame Relay

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Medium

• Kbps Mbps
• Solid Stranded
• PVC Plenum
• Shielded Unshielded
• EMI RFI

• Twisted Pair, UTP, STP
• Cat 3, 5, Above
• Patch
• Straight Cross Pinning
• Crossover or Null Modem

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Medium

• Coaxial
• Thinnet, Thicknet
• Multimode Fiber
• Single Mode
• Cladding, Core
• Duplex, Simplex

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• 10 (10 Mbps), 100 (100 Mbps), 1000 (1000 Mbps).
• BASE means the type of signaling used is baseband
  instead of broadband.
• 2 or 5 at the end indicates the maximum cable
  length in meters.
• T at the end stands for twisted-pair cable
• F at the end stands for fiber optic cable. L
  stands for long wave and S stands for short wave.
• X stands for full-duplex. Without the X, it is
  half-duplex. H is also half-duplex. (Full and
  half-duplex are explained in the later
  Types-of-Transmissions section.

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Distance (Non-Tricky) Question

• 100 Meters (not feet)

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Terminology

• Know terms about network types.
• And terms used in assignments.

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IP Commands

• First of all, know Ping and IPConfig /All
• In chapter 2, we covered
• nbtstat a your partners computer_name
• arp a
• hostname

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List Questions

• See Appendix I.

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Where Questions

• See Appendix II.

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Addresses

• See Fig. 3.4, Table 3.2, and Fig. 3.5.