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63 Cards in this Set
- Front
- Back
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what does the overall design consist of? (4things)
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physical components, network technologies, interfacing software, and protocols need to establish a reliable connection such as TCP/IP, DHCP, OSI model
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Types of physical network architectures...4
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ethernet
token ring FDDI wireless lan |
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ethernet is the______ _______ network architecture
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most popular
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Token ring..developed in?..disadvantage?
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1980's
every node receives info even if it is not needed |
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what does FDDI stand for?
and what is it used? |
fiber distributed data interface
associated when dealing with fiber optics as a network topology |
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wireless lan...speed and advantages?
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54 mbps or 2.4 ghz....no wires, faster than lan
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network adapter is needed in order to...?
is also called a ? |
connect to a network
NIC |
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network adapter requirements
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must match type/speed of physical network in use and network port must match type of connectors used on the network
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examples of hardware protocols
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ethernet, token ring
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OS protocols
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NetBEUI and TCP/IP
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the maximum size of packets, data grams or frames depends on?
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type of network
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packets have both a header and a footer....what do they do?
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header tells destination address
footer tells ip address of where it came from |
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CRC
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cyclical redundancy check
technique of calculating and comparing values |
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what does redundancy mean
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checks and re checks
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10 mbps ethernet uses wat type of cabling
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uses stp, utp, or coaxial cable
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100 mbps or fast Ethernet uses what type of cabling
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stp or utp
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100 base fx uses what type of cabling
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fiber optics: single mode, multi mode or plastic
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what is the difference between multi mode and single mode fiber optics
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single is one direction multi mode is bi directional
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1000 mbps aka gigabit ethernet..cabling?
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twisted pair and fiber optic cable
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why are twisted pair cables twisted?
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cut down on frequencies
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coaxial cable is also called
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bnc connector
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bus topology
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connects nodes in a line, no centralized point of connection
terminator sends signal back and forth |
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star topology
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connects nodes to a centralized hub...more popular
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characteristics of ethernet network
3 |
passive network
contention based system nobdes contend for an opportunity to transmit on the network requires collision control |
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3 ways ethernet controls traffic
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CSMA/CD
CSMA/CA TOKEN METHOD |
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CSMA/CD
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carrier sense multiple access with collision detection
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CSMA/CA
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carrier sense multiple access with collision avoidance
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what do repeaters do
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restores clarity of signal
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characteristics of token ring
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physical star, logical ring
data packet is preceded by token transmits data at 4 or 16mbps uses centralized device called MAU |
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wat centralized device is used with token ring
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MAU
multi station access unit |
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characteristics of FDDI
4 |
uses token that travels in a ring
data frames travel on the ring without the token multiple nodes can have data on the ring at the same tim provide data transfer at 100mbps |
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sub net mask
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determines which network segment the packet is destined for
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disadvantages of wireless network (2)
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slower than wired networks
security is an issue |
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what is needed to make a connection when using WLAN
3 |
wireless nic
network bridge or sometype of router access point |
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WLAN...what are infrared transmissions and antennas used for
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to send and receive signals in places where networking cables are difficult to install
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can wireless lans be used in combination with wired lans
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yes
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wireless lan standard
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1999 EEE 802.11b (wi-fi airport)
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speed of WLAN
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54mbps???
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requirements...connecting pc to network
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nic
at least 2 patch cables device for pc to connect to |
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what do the DNS and DHCP share
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the same address
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what does RAID do
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spread the OS over multiple drives
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DNS
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associates ip addresses with domain names to make navigation on the internet much easier
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what do nic's do
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manage communication and hardware network protocols for the pc
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what is provided on the back of a nic
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port(s) for connection to network
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network card requirements 4
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irq
i/o address upper memory (for DOS & windows 9x real mode) maybe PnP or can use jumpers or DIP switches |
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things to consider when selecting a NIC
3 |
speed/type of network(except for wireless)
type of cable(stp, coaxial, fiber etc) type of slot (PCI OR ISA) |
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why are switches better than hubs
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send packet to designated network segment
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what protocol is used to communicate between networks
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tcp/ip (not MAC addresses)
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routers use ip addresses to
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determine path by which to send a packet
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routers vs switches
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routers are more efficient than switches in choosing routes for packets over long distances
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routers are also known as
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stateless devices
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routers are unconcerned with..? and are more concerned with..?
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unconcerned about data
concerned with destination of address and networking protocols |
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a router can transmit a data packet to a remote network only if a routable protocol:
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was used to produce the packet
can be routed to a remote network |
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routable protocols
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TCP/IP
IPX/SPX |
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non routable protocols
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NetBEUI
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what is the domain
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container where all your computers reside
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wireless network parameters
5 |
1.state
2.current channel(available channel) 3.throughput, link quality & signal strength 4.current tax rate 5.computer must be within acceptable range of an access point or another wireless device that will connect it directly |
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symptom of NIC problems
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can't make a connection
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trouble shooting a network
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check connections in rest of network
reboot pc and reset network connections make sure NIC & its drivers are installed |
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advantages of segmenting a network
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decreases amount of traffic on network
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what devices are typically used to segment a network..and what do they do
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bridges and switches
make decisions about whether or not to allow traffic to pass, or where to forward that traffic |
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disadvantages of bridges
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broadcast msgs
dont work well with large networks |
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advantages of bridges
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effective at seperating high volume ares on a LAN
work best when used to connect LAN's that usually don't communicate outside their network |
