Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Section 1

TCP - Transmission Control Protocol OSI Layer 4, “ Reliable” delivery • Recovery from errors • Can manage out-of-order messages or retransmissions
Non-ephemeral ports Permanent port numbers • Ports 0 through 1,023 • Usually on a server or service
Ephemeral ports Temporary port numbers • Ports 1,024 through 65,536 • Determined in real-time by the clients
ICMP- Internet Control Message Protocol • “Text messaging” for your network devices • Another protocol carried by IP - Not used for data transfer
tcp/22 SSH - Secure Shell • Encrypted communication link - tcp/22 • Looks and acts the same as Telnet
udp/53 DNS - Domain Name System Converts names to IP addresses
tcp/25 SMTP - Simple Mail Transfer Protocol • Used to send mail from a device to a mail server • Commonly configured on mobile devices and email clients • Other protocols are used for clients to receive email • IMAP, POP3
tcp/22 SFTP - Secure FTP Uses the SSH File Transfer Protocol Provides file system functionality Resuming interrupted transfers, directory listings, remote file removal
tcp/20 (active mode data) or tcp/21 (control) FTP - File Transfer Protocols Transfers files between systems • Authenticates with a username and password • Full-featured functionality (list, add, delete, etc.)
udp/69 TFTP – Trivial File Transfer Protocol • Very simple file transfer application • Read files and write files • No authentication - Not used on production systems
TCP/23 Telnet - Telecommunication Network • Login to devices remotely • Console access • In-the-clear communication • Not the best choice for production systems
udp/67, udp/68 DHCP - Dynamic Host Configuration Protocol • Automated configuration of IP address, subnet mask and other options
HTTP Hypertext Transfer Protocol
udp/161 SNMP - Simple Network Management Protocol
SNMP • v1 – The original • Structured tables, in-the-clear • v2 – A good step ahead • Data type enhancements, bulk transfers • Still in-the-clear • v3 – The new standard • Message integrity, authentication, encryption
tcp/3389 RDP - Remote Desktop Protocol Share a desktop from a remote location Remote Desktop Services on many Windows versions • Can connect to an entire desktop or just an application
udp/123 NTP - Network Time Protocol • Switches, routers, firewalls, servers, workstations • Every device has its own clock
tcp/5060 and tcp/5061 SIP - Session Initiation Protocol • Voice over IP (VoIP) signaling
tcp/445 SMB - Server Message Block Protocol used by Microsoft Windows • File sharing, printer sharing • Also called CIFS (Common Internet File System)
TCP/110 POP3 - Post Office Protocol version 3 Receive mail into a mail client
Tcp/143 IMAP4 - Internet Message Access Protocol v4 A newer mail client protocol
tcp/389 LDAP - Lightweight Directory Access Protocol - A newer mail client protocol
tcp/636 LDAPS - Lightweight Directory Access ProtocoL SECURE LDAP over SSL
tcp/1720 H.323 - ITU Telecommunica5on H.32x protocol series Voice over IP signaling
Layer 1 Physical Signaling, cabling, connectors (Cable, NIC, Hub)
Layer 2 Data Link The Switching layer (Frame, MAC Address, EUI-48, EUI-64, Switch
Layer 3 Network The routing Layer (IP Address, router, packet)
Layer 4 Transport The post office layer (TCP SEGMENT, UDP DATAGRAM)
Layer 5 Session Communication between devices( Control protocols, tunneling protocols)
Layer 6 Presentation Encoding and encryption (SSL/TLS)
Layer 7 The layer we see (Google Mail, Twitter, Facebook)
Preamble 7 bytes 56 alternating ones and zeros used for synchronization
SFD 1 bytes Start Frame Delimiter - designates the end of the preamble
Destination MAC Address 6 bytes Ethernet MAC address of the Destination device
Source MAC Address 6 bytes Ethernet MAC address of the source device
EtherType 2 bytes Describes the data contained the payload
Payload 46 - 1500 bytes Layer 3 and higher data
FCS 4 bytes Frame Check Sequence - CRC checksum of the frame
Created by: Riku254