2) LAN (28) - ANSWER What is a LAN?
- local area network
- small network confined to small location
- all equipment owned by a single entity
- vulnerable to inside threats and logic bombs
3) WAN (28) - ANSWER - Wide Area Network
- Larger than MAN or LAN
- uses public network, phone lines, and leased lines to tie LAN and MAN over a
dispersed area
4) MAN (28) - ANSWER What is a MAN?
,- metropolitan area network
- spans across city or town
- larger than a LAN, uses fiber for backbone
5) Internet (28) - ANSWER What is internet?
- connects many WANs, MANs, and LANs
- provided via ISP
6) PAN (28) - ANSWER What is a PAN?
- personal area network
- phone tethering, bluetooth, etc
7) Physical Topologies (30) - ANSWER
8) Logical Topologies (30) - ANSWER
9) Ethernet (32) - ANSWER Ethernet, Collisions, Types of Ethernet
Ethernet is shared media
Most common logical topology or layer 2 protocol
Steps taken to communicate
Listen before transmitting
Make sure only one station is transmits at a time
Monitor transmissions to check for collisions
,10) Wan Technologies (33) - ANSWER Wan, dedicated lines, frame
relay,mpls, isdn,dsl,cable model, wan aggregation
Hub (36) - ANSWER
Bridge (36) - ANSWER
Switch (36) - ANSWER
Router (36) - ANSWER
Embedded Switches (39) - ANSWER Routing capability, Perform load
balancing based on the type of traffic requested
Power over Ethernet (39) - ANSWER Power over Ethernet: Allowing VOIP
devices to connect without external power
VLAN (41) - ANSWER Allows seg of a switch into dif networks, regardless of
where a system is plugged in
Creates sep networks through software, not hardware
NAC (41) - ANSWER Dynamic VLAN allocation
Isolates systems when they initially connect to the network
Enables systems to be scanned and checked prior to being put on a trusted
segment
Network Sections - ANSWER Network Segments: (Public, semi public,
private)
Public: Internet
Semi-public (DMZ): web, mail, dns servers
Middleware: separate dmz from the private network
Private: internal systems
Locate firewalls:
Between the internet and the other networks
Semi public and private network
Sections of varying trust levels
3 Goals of Network Design - ANSWER 3 goals of Network Design
Any system visible from the internet must reside on the dmz and cannot contain
sensitive info
Any system with sensitive info must reside on the private network and not be
visible from the internet
Only way a dmz system can communicate with a private network system is
through a proxy on middleware tier
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