Exam (elaborations)
CompTIA A+ core 1_ Chapter 2 (Networking) (1)
CompTIA A+ core 1_ Chapter 2 (Networking) (1)
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CompTIA A+ core 1: Chapter 2 (Networking)IP (Internet Protocol) - ANS--Transfer large amounts of data
-Uses network topology for transfer (ethernet, DSL, cable system
-Holds UDP and TCP
-UDP and TCP hold app. info.
TCP and UDP - ANS--Encapsulated by IP protocol
-OSI layer 4 (transport layer)
-Mulitplexing
Multiplexing - ANS--Be able to use many different apps at the same time
-Capability provided by UDP and TCP to IP
TCP (Transmission Control PRotocol) - ANS--connection-oriented protocol
-Reliable delivery (built in system to ensure data sent has been verified as received)
-Recovery form errors
-Data flow can be managed by receiver
UDP (User Datagram Protocol) - ANS--Connectionless
-"Unreliable" delivery (No error recovery or reordering of data or retransmissions)
-No flow control
Port - ANS-Location where IP packets are transferred to
-Have identifying numbers
-Uses socket to drop data to correct application
Socket - ANS--Combination of IP address and Port number
-Identifies a computer as well as a program within the computer
IPv4 - ANS--IP Socket
-32 bit address
IPv6 - ANS--IP Socket
-64 bit address
FTP (File Transfer Protocol) - ANS--tcp/20 (active mode data)
-tcp/21 (control) - --transfer files between systems with authentication (username and password)
-full featured functionality
SSH (Secure Shell) - ANS--tcp/22
-looks and acts the same as telnet
, -More secure than telnet for terminal communication
Telnet (Telecommunication Network) - ANS--Tcp/23
-Login to devices remotely
-Console access
In-the-clear communication
-Not the best choice for production systems
SMTP (Simple Mail Transfer Protocol) - ANS--tcp/25
-Server-to-server email transfer
-Send mail from a device to a mail server
DNS (Domain Name System) - ANS--udp/53
-Converts names to IP addresses
-multiple servers used
DHCP (Dynamic Host Configuration Protocol) - ANS--udp/67, udp/68
-Automated config of IP address, subnet mask and other options
-Rquires a DHCP server
-Dynamic/pooled
HTTP (Hypertext Transfer Protocol) and HTTPS (Hypertext Transfer Protocol Secure) -
ANS--tcp/80 and tcp/443 respectively
-browser communication
-In-the-clear encryption
-Supported by most web servers and clients
POP3 (Post Office Protocol 3) - ANS--tcp/110
-receive emails from email server
-Downloads email from server to local device and then deletes data from server
IMAP 3 (Internet Message Access Protocol v4) - ANS--tcp/143
-Stores data in remote server and syncs it across multiple devices
-management of email inbox from multiple clients
NetBIOS (Network Basic Input/Output System) - ANS--udp and tcp/137, udp/138, tcp/139
-Syncs devices to access shared devices through LAN
SNMP (Simple Network Management Protocol) - ANS--UDP 161(Queries), 162 (Traps)
-Gather Stattistics from network devices
-v1, v2, and v3
SNMP v1 - ANS--original
-structured tables
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