Hi Michael,
I am trying to make sure I get this right the only time you use the clock rate command on the router is in lab enviornments not in real world because in lab enviornment you are using two routers connected with a DCE/DTE cable and one router is supplying to clock rate. But in real world the CSU/DSU are supplying the clockrate but even if the clockrate is supplied by the CSU/DSU does the router still need to be configured with that clock rate that the CSU/DSU supplied or does the router pick up the clock rate automatically and will the test be based on LAB Enviornment or Real World I just want to make sure I get this right
Well in most real wold cases - provider will be the one that has clock configured, so your device will be a DTE. No clock rate command needed (clock will be provided to you).
In laboratory conditions, you must configure both sides (DCE(provider side) and DTE).
Also with clockrate and bandwidth commands do you have enter both commands on the routers when configuring clock rate speeds I guess for lab enviornment end or real world in whats the difference between clock rate bandwidth other than the unit at which they use which clock rate command uses bps, and bandwidth uses kbps
clock rate and bandwidth commands are totally different commands and please, do not consider them interchangeable or something like that. Both have different purpose that will show up later in your studies.
clock rate - this one is pretty much obvious, as you stated - it sets the actual rate in bps(bits per second)
bandwidth - has no impact on speed of the link but has quite an impact in many different things. For example: It is used by routing protocols such as EIGRP,OSPF for metric calculation or in QoS (Quality of Service). I have read that also TCP will adjust its initial retransmission parameters based on the bandwidth configured on the interface but I have not tested it.
Best regards,
Jan
