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Terms in this set (67)
anything that interacts with the network. Online games, P2P file share, chrome, firefox
how you present the data such file formats as fttp, html
starts and stop session, maintains makes sure session is active
-How the data is sent. (tcp/udp)
- it deals with how the application layer will send the information thoughout the network.
-It could be reliable and unreliable.
Data Link (Frames)
Physical Address (MAC)
Whatever you can touch in the desk
MAC Address sonar
destination address message
command arp -a
-12 characters long
-0-9 and A-F
-48 hexadecimal address
enabled in the router packets it as a unicast
Private IP addresses
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Automatic Address (APIPA)
169.254.0.0 - 169.254.255.255
127.0.0.0 - 127.255.255.255
Network Address Translation
Regular Class A, B, and C with their respectful subnet mask.
CIDR, different length subnet masks
Message to all devices
Message to one device
A group of devices
Show all TCP/IP details
renew all adapters
ipconfig /renew EL*
renew any connection that has its name starting with EL.
release all matching connections, eg. "Local area connection 1" or "Local area connection 2"
show information about all compartments
ipconfig /allcompartments /all
show detailed information about all compartments
unreliable "hope it gets there" (VOIP phones, DNS)
A utility that is used to test and troubleshoot domain name servers.
Multiple web servers on the nslookup means...
balancing the load of users.
reliable "I know it got there" 3 way handshake. (syn, syn-ack, ack)
TCP window sizing
Reason for the long time estimate when sending packets is the TCP taking effect. When sending packets, it first sends 1 then gets an answer back = 2 ½ days, then sends 4 gets answer back = 1 ½ back, then sends 50 and cuts time down to an hour and so on and so forth.
Good check for viruses
FCS and CRC
The FCS field contains the data used to verify accurate delivery of frames. CRC is the method (algorithm) performed on that data to do the verification.
Putty (Speed baud)
Types of terminal programs
-Secure CRT ($99 Windows/Apple)
Simple devices that connect network components, sending a packet of data to all other connected devices (10 mbps)
Carrier Sense Multiple Access
Collision Detection (Collision Avoidance)
(Walkie Talkie) (one collision domain) this meaning send or receive not both.
similar to hubs, learned mac addresses, and limited ports.
main difference is ASIC (Application Specific Integrated Circuitry) it essentially moved from software to hardware.
(Telephone) Send and receive
placed on switches in order to connect fiber.
Multi mode fiber
cheap, plastic, doesn't go far.
Single mode fiber
not cheap, glass, goes far.
Cisco Internetwork Operating System
layer 2 and layer device.
Would you like to enter the initial configuration dialog? (yes or no)
Always answer NO
User mode (user exec)
Privilege Mode (privilege exec)
global configuration mode
To lower or end escalation
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