Network Devices
Networking Essentials
Chapter 5
Fall, 2012
Common Networking Devices
 Hub
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Multiport repeater (huh?)
 Repeater
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Why use it?
 Modem (name comes from…)
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POTS
DSL (can connect to switch)
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Need adapter to avoid hiss
Cable (connects through television cable service)
More Networking Devices
 NIC (stands for…)
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Two lights
First light is for…
 Second light is for…
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 Transceiver
 Bridge
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Purpose is to break up…
 Switch
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Multiport bridge (huh?)
Still More Networking Devices
 Wireless Access Point (WAP)
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Wireless form of a …
 Router
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Used to connect…
Have their own…
 Firewall
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Can be software or hardware based
Black box / DMZ
Two internet connections for…
OMG! More Networking Devices
 DHCP Server
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Provides______ to hosts
Leases
How it works
MUCH more in Chapter 6!!!
Specialized Devices
 Multilayer switch
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Does Layer 2 and Layer 3 switching (router)
 IDS / IPS (page 148)
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Like a hardware based malware detection device
 Load balancer (read example on page 149)
More Specialized Devices
 DNS Server
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Like a two-column Excel spreadsheet
Top-level domains:
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Com
Edu
Gov
Int
Mil
Net
Org
(two-letters) designate…
Don’t need a DNS server if…
Newer domains
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.firm
.store
.arts
.info
.cc
.biz
.travel
.post
Even More Specific Devices
 Bandwidth Shaper – used to…

Don’t need one if you…
 Proxy Server
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Caching proxy server
Web proxy server
 CSU / DSU
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Used to connect ___________ to the _________
Network Segmentation
 What causes LAN congestion? (page 157)
 Two advantages of using routers (page 158)
 What to remember about routers (page 163)
Network Segmentation
 Read and make sure you understand
segmentation section on pages 157 – 165 in
book. It’s not hard, but it IS important!
fin