CompTIA
Exam Vouchers
Save money on CompTIA exams
| Question of the day
Sign up to receive
interactive practice questions
for MCSE, CompTIA
Cisco and other exams
| TestKing
Get MCSE, MCSD, CCNA, CCNP,A+, N+ and many more | * ExamSheets *
Guide for Success!
Actual Questions & Answers
MCSE, MCSD, A+ ,CCNA, CCNP
Oracle 8i, Oracle 9i Online practice tests
Certification sites Online university Online college Online education Distance learning Software forum Server administration forum Programming resources
|
|  |
amrx
Junior Member
M
Registered: Jun 2003
Location:
Country: India
State:
Certifications: CCNA
Working on: CCNP, CCSP
Total Posts: 29
|
|
 help needed
can anyone plz tell me what pop3 uses at layer 4? book tells me its udp where people say its tcp. is there any documentation for these kinda questions? any RFCs?
Report this post to a moderator
|
|
 08-10-03 11:55 AM
|
|
darthfeces
Senior Member
Registered: Mar 2001
Location: somewhere, NJ
Country: United States
State:
Certifications: A+, N+, I-net+, CCNP, CCDP, CCSP, CISSP
Working on: CCIE R&S Lab CCIE-S, PMP, CISM
Total Posts: 1786
|
|
|
|
08-10-03 04:45 PM
|
|
edmonds_robert
Senior Member
M
Registered: Sep 2002
Location:
Country: United States
State:
Certifications: MCSE, CCNA, CCA
Working on: CCNP, MCSE 2000, Linux+, Playstation 2+
Total Posts: 367
|
|
|
Darth is correct. SMTP uses UDP port 25, maybe that's where the confusion is coming in.
__________________
Save the animals. Eat a vegetarian.
Report this post to a moderator
|
|
|
08-11-03 02:29 AM
|
|
amrx
Junior Member
M
Registered: Jun 2003
Location:
Country: India
State:
Certifications: CCNA
Working on: CCNP, CCSP
Total Posts: 29
|
|
|
thnx to both of u but recently i found that pop3 uses both tcp and udp at 110. i found it out from www.iana.org. also dns uses tcp and udp at port number 53. i guess networking is meant to be confusing. u can always blame it for ur fault 
Report this post to a moderator
|
|
|
08-14-03 11:14 AM
|
|
darthfeces
Senior Member
Registered: Mar 2001
Location: somewhere, NJ
Country: United States
State:
Certifications: A+, N+, I-net+, CCNP, CCDP, CCSP, CISSP
Working on: CCIE R&S Lab CCIE-S, PMP, CISM
Total Posts: 1786
|
|
|
well i was aware that dns uses tcp and udp 53 .... so it can take advantage of both reliable slower (tcp) and unreliable faster(udp) transport.
i suspect pop3 does the same thing though i am not aware of the specific conditions under which it will utilize each.
pop3 listens tcp/110 for connections and may send some replies encapsulated udp.
i guess this is one of those things that we overlook because it works and really aren't going to fully understand unless you really dig into the nuts and bolts.
__________________
http://www.cisco.com/univercd/
Last edited by darthfeces on 08-14-03 at 04:10 PM
Report this post to a moderator
|
|
|
08-14-03 04:07 PM
|
|
edmonds_robert
Senior Member
M
Registered: Sep 2002
Location:
Country: United States
State:
Certifications: MCSE, CCNA, CCA
Working on: CCNP, MCSE 2000, Linux+, Playstation 2+
Total Posts: 367
|
|
|
Damn, I thought I was going to get through today without learning anything, and you ruined it. 
__________________
Save the animals. Eat a vegetarian.
Report this post to a moderator
|
|
|
08-14-03 09:10 PM
|
|
|
Click here for list of CCNA study
guides
Cisco exam notes
CCNA(tm) exam details
Forum Rules:
Who Can Read The Forum? Any registered user or guest.
Who Can Post New Topics? Any registered user.
Who Can Post Replies? Any registered user.
Changes: Messages can be edited by their author.
Posts: HTML code is OFF. Smilies are ON. vB code is ON. [IMG] code is ON. |
|
ExamNotes forum archive
|
