1. Installing and Troubleshooting Networks
Chapter Eighteen
Installing and Troubleshooting Networks

2. 3.0 Objectives Covered
3.1 Troubleshoot client-side connectivity issues using appropriate tools
TCP/IP settings
Gateway
Subnet mask
DNS
DHCP (dynamic vs. static)
NAT (private and public)
Characteristics of TCP/IP
Loopback addresses
Automatic IP addressing
Mail protocol settings
SMTP
IMAP
POP
FTP settings
Ports
IP addresses
Exceptions
Programs
Proxy settings
Ports
IP addresses
Exceptions
Programs
Tools (use and interpret results)
Ping
Tracert
Nslookup
Netstat
Net use
Net /?
Ipconfig
Telnet
SSH
Secure connection protocols
HTTPS
Firewall settings
Open and closed ports
Program filters 2

3. 3.0 Objectives Covered
3.2 Install and configure a small office home office (SOHO) network
Connection types
Dial-up
Broadband
DSL
Cable
Satellite
ISDN
Wireless
All
WEP
WPA
SSID
MAC filtering
DHCP settings
Routers/Access points
Disable DHCP
Use static IP
Change SSID from default
Disable SSID broadcast
Change default username and password
Update firmware
Firewall
LAN (10/100/1000BaseT, Speeds)
Bluetooth (1.0 vs. 2.0)
Cellular
Basic VoIP (consumer applications)
Basics of hardware and software firewall configuration
Port assignment/setting up rules (exceptions)
Port forwarding/port triggering
Physical installation
Wireless router placement
Cable length 3
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4. Choosing an Internet Connection
Dial-up/POTS
DSL
Cable
ISDN
Satellite

5. Internet Connection Summary
Designation
Download Speed Range
Description
POTS
2400bps to 56Kbps
Plain old telephone service. A regular analog phone line.
DSL
256Kbps to 12Mbps
Digital subscriber line. Shares existing phone wires with voice service.
Cable
128Kbps to 50Mbps
Inexpensive broadband Internet access method with wide availability.
ISDN
64Kbps to 1.5Mbps
Integrated Services Digital Network. Once popular for home office Internet connections.
Satellite
128Kbps to 1.5Mbps
Great for rural areas without cabled broadband methods.

6. Choosing Internal Network Connections
Wired connections
Twisted pair
Fiber optic
Wireless connections
802.11
Bluetooth
Cellular

7. 802.11x and Cellular Standards
Type
Frequency
Maximum
Data Rate
Indoor
Range
Outdoor
802.11a
5GHz
54Mbps
35m
120m
802.11b
2.4GHz
11Mbps
40m
140m
802.11g
802.11n
2.4/5GHz
300Mbps
70m
250m
Cellular
Standard
Maximum
Data Rate
Range
Availability
GSM
171Kbps
35 kilometers (22 miles)
Worldwide
CDMA
3Mbps
100 kilometers (62 miles)
United States

8. Installing a Network Planning Physical installation Network cards
Configuration
Wireless network cards
Network cables
Wireless access points and routers

9. Types of Firewalls
Network-based
Host-based

10. Firewall Concepts Default deny or default allow
Access Control List (ACL)
Port forwarding
Port triggering

11. Troubleshooting TCP/IP
Basic settings
IP address
Subnet mask
Default gateway
DNS
DHCP
APIPA
NAT
Loopback address

12. TCP/IP Protocols
SMTP
POP
IMAP
FTP
SSH
HTTPS

13. Client Side Tools ping tracert nslookup netstat net use net /?
ipconfig
telnet
ssh