Can you log into your JCCL unix account on ocelot and all JCCL unix workstations?
Have you changed your JCCL unix password to a decent password?
Have you logged into your JCCL windows account?
Have you changed your JCCL windows password to a decent password?
Have you sent a test email to esj@cs.fiu.edu and received a response?
Have you read the basic UNIX tutorial?
Have you played with wireshark? Here are some pcap files to
download and look at with wireshark. Don't worry if at this point
you do not understand everything going on in them. You will learn
all about them thes semester.
-
Ping from IP 131.94.133.12 to IP 131.94.130.107
pcap
Review with wireshark. Make note of the Layer 2 source and destination addresses.
-
Some ARP requests and replies as seen from 131.94.133.12 on
network 131.94.133.0/26 pcap
Review with wireshark. Make note of the Layer 2 source and destination addresses.
-
Some UDP NFS communications between IP 131.94.133.12 to IP 131.94.130.107
pcap
Review with wireshark. Make note of the Layer 2 source and destination addresses.
-
Some TCP communication between 131.94.133.12 (acting as client)
and 131.49.130.72 (acting as echo server). The data sent was "hello line 1"
and "hello line 2" pcap
Review with wireshark. Make note of the Layer 2 source and destination addresses.
-
Some TCP communication between 131.94.133.12 (acting as client)
and 131.49.130.45 (acting as http server). The client shutdown a
TCP HTTP connection (packets 1/2) then opened a new HTTP connection
to 131.49.130.45 with the HTML request of "GET /~esj/myhouse.gif".
Then 131.49.130.45 proceeds to send the requested picture.
pcap
Review with wireshark. Make note of the Layer 2 source and destination addresses.
The OSI model consists of how many Layers? Name Them.
Does the OSI model match modern networks systems exactly?
What layer is closest to the transmission medium (IE closest to the wire)
In what layer is the data unit usually called a frame?
In what layer is the data unit usually called a packet?
In what layer is the data unit usually called a segment?
As the data packet moves from lower (hardware) to upper (user) layers
headers and/or trailers are (added or deleted)
As the data packet moves from upper (user) to lower (hardware) layers
headers and/or trailers are (added or deleted)
What is the main function of the transport layer? What about the session layer?
When we talk about Ethernet we are talking mostly about which OSI "layer"?
When we talk about IP we are talking mostly about which OSI "layer"?
When we talk about TCP we are talking mostly about which OSI "layer"?
What is the difference between two hosts on the same "network" and two
hosts on the same "Internetwork"?
Two hosts are on the same layer 2 network. Can they communicate directly (without using a layer 3 router)?
Two hosts are on the same layer 3 internetwork but not on the same layer 2 network. Can they communicate directly (without using a layer 3 router)?
When were the IP and TCP and UDP protocols defined? In what type of document?
Who publishes these documents? Where would you go on the Internet to look these
up these documents?
Who sets the standards for Ethernet?
When was the the TCP/IP RFC released?
Where would you look to file the current "Best practices" documents for the Internet?