اريد اجابات مختصره وبالانجليزى لهذه الاسئله

[offline]

What are the types of internet Service
What DSL means
What TCP/IP mean
what is the Differentiate between DSL, ISDN and Dial
What is difference between public ip and priVATe ip
what is the diffrence between Full-Duplex and half-Duplex and Simplex
what is the diffrence between ping and teaceroute
what is the diffrence between nat and pat
what is the diffrence between SMTP and POP3
what is the diffrence between LAN and WAN
what is different between switch and router

ارجو الرد من سيادتكم

[westwind]

عزيزي اوفلاين.. لقد إطلعت على مشاركاتك السابقة و فهمت انك حاصل على CCNA و MCITP و ان مستواك في الانجليزي جيد جداً على حد قولك. هل الاسئلة المذكورة لم تجدها في كتب الشهادات التي حصلت عليها ؟ و لم تمر عليك ابداً في الدراسة ؟

[offline]

نعم يا اخى واعلم معنى هذه الكلام ولكن انا اريد اختصارات تفيدنى فى الانترفيو يعنى عايز اختصر قدام ال HR لاننى مش عملت انترفيو قبل كده ومش عايز اقف قدامه وافضل اقول فى التعريف اكتر من اللازم علشان مش يزهق من الكلام انا طلبت اجابات مختصره وليست اجابات كامله مجرد كلمتين عن كل حاجه ارجو ان تفهمنى

[ibrahimovic22]

1- internet services include a wide varity of services for WAN services the type could be

dedicated circuit a.k.a leased lines,packet switched,cell switched,and circuit also Internet

services include web hosting ,cloud services i.e google docs, ASP Application Service Providers the

list goes on and on
2-Digital Subscriber Line
3-Transmission Control Protocol over(/)IP (Internet Protocol
4-refer to
https://en.wikipedia.org/wiki/Dial_up
https://en.wikipedia.org/wiki/Broadb...igital_Network
https://en.wikipedia.org/wiki/Integr...igital_Network
https://en.wikipedia.org/wiki/Digital_subscriber_line
5-public IPs are routable on the internet ,Private IPs are not
6-suppose two communicating devices A and B
if and only if A always send data and B always recieve this data then this is a simplex

commuincation,i.e TV station and your TV
if A and B can send and recieve data but only one device can send at a time then this is a half-

duplex communication i.e A and B are 2 PCs connected via a HUB
if A and B can send and recieve data in the same time then this is a Full-duplex communication i.e

A and B are 2 PCs connected via a SWITCH
7- both of them are 2 facilities/utilities that make use of ICMP protocol
ping is used to check/assure the avilability of an other node/host/TCPIP capable device by sending

ICMP type 8 -echo request -and wait for ICMP type 0 -echo reply-from the other device
traceroute is used to tace the route to the other device it uses ICMP type8 echo request and waits

for either ICMP type 11 time exceed or type 3 unreachable
Note that ICMP's main purpose is diagnosis
8-both of them are Addressing translation mechanisms
NAT will translatea an internal IP address to an other Basically Routable address from a pool of a

Public dresses it can be static or dynamic
PAT is the same except that it can translate all Internal (private) IP addresses to one Public IP

by use a combination of
source IP : Source port No ---->destination IP: destination Port No
so PAT make use of layer 4 port numbers you can map all internal IP addresses to one Public IP with

PAT it will use port numbers to distinguish between sessions
9-SMTP is an MTA mail trasport agent,it is like a router that will route mail messages

POP3 is used to get your mail the so SMTP is used to upload the mail message and route it then client uses POP3 to pull the message to his desktop via i.e MS outlook
POP3 stands for Post Office Protocol version 3
10-LAN local Area Network WAN is Wide Area Network the differnce is that with WAN you don't own the

communication infrastructure ,you will use the infra of an ISP ,,,,, however with LAN you do own

the network infra
you may mention the geographical stretch but it is dialectical
11-switch is a layer 2 device that understand/switches/routes Frames based on MAC addresses,

switch is one broadcast domain by design unless of cource you are using VLANs
router is a layer 3 device that understand /switches/routes packets based on IP addresses, router

separates broadcast domains or subnets by design