101 Flashcards
Application delivery fundamentals
Describe the function of the Application layer.
The application layer defines services the applications need.
Describe the function of the Presentation layer.
The presentation layer defines and negotiates data formats. Encryption is also defined as a presentation layer service.
Describe the function of the Session layer.
The session layer defines how to start, control and end sessions.
Describe the function of the Transport layer.
The transport layer is responsible for maintaining flow control.
Describe the function of the Network layer.
The network layer defines logical addressing, routing and path determination.
Describe the function of the Data link layer.
The data link layer defines the rules that determine when a device can send data over a particular medium. Data link protocols also define the format of a header and trailer that allows devices to send and receive data.
Describe the function of the Physical layer.
The physical layer refers to standards that deal with physical characteristics of the transmission medium and the rules for how to activate and deactivate the use of the physical medium.
Describe the address types at the Physical layer.
Hubs, repeaters, cables, SONET/SDN, connectors
Describe the address types at the Data link layer.
802.11 (WLAN), Wi-Fi, WiMAX, ATM, Ethernet, Token Ring, Frame Relay, PPTP, L2TP and ISDN
Describe the address types at the Network layer.
IPv4, IPv6, IPX, OSPF, ICMP, IGMP and ARP
Describe the address types at the Transport layer
TCP, SPX and UDP
Describe the address types at the Session layer
Logical Ports 21, 22, 23, 80 etc
Describe the address types at the Presentation layer
SSL, WEP, WPA, Kerberos
Describe the address types at the Application layer
DHCP, DNS, HTTP, IMAP4, NNTP, POP3, SMTP, SNMP, SSH, TELNET and NTP
Explain the purpose of a switch’s forwarding database
The forwarding database is used to store the learned MAC addresses and the ports that the MAC addresses were learned on.
