452548
Description
Flashcards by Joshua Snider, updated more than 1 year ago
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Created by Joshua Snider
almost 11 years ago
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| Question | Answer |
| What are the 4 layers of the DOD model? | Process/Application, Host-to-host, Internet, and Network-access |
| Which layers of the DOD model correspond to the OSI model | Process=Application, Presentation, session. Host-to-host=Transport. Internet=Network. Network-access=Data Link, & Physical |
| Describe the Telnet protocol | Allows telnet client to access resources on telnet server. |
| Describe FTP | (file transfer protocol) lets you transfer files across IP |
| what is the username needed to bypass regular authentication for FTP | anonymous |
| What are some major functions of FTP and what is 1 function you cannot do | Viewing and manipulating directories and copying files from one host to another. You cannot execute programs remotely. |
| Describe SFTP | Secure FTP uses SSH (secure shell) to encrypt FTP activity |
| Describe TFTP | Trivial FTP can only send/receive files. Cannot browse/manipulate directories. Less overhead and faster |
| What is SMTP protocol used for | Sending email. AKA push protocol. Stands for Simple mail transfer protocol. |
| What is POP used for. | Post Office Protocol. Used for receiving email. |
| What is IMAP used for? | Selectively downloading email. |
| What are some features that make IMAP better than POP? | Security=you can see part of the message before you download. You can selectively download. You can search for specific messages. And is capable of using SSO like Kerberos. |
| What are the current versions of POP and IMAP? | POP3 and IMAP4 |
| What is RDP function? | To connect to another computer and run programs. |
| What company developed RDP? | Microsoft |
| What do TLS and SSL stand for and what do they do? | Transport Layer Security and Secure socket layer. They are cryptographic protocols used for secure internet connection. |
| Describe SIP and RTP | Session Initation Protocol=sets up and tears down multimedia connection such as VOIP. Real-time Transfer Protocol deals with packet formatting for delivering audio/video over the internet such as VOIP. |
| What does SNMP do? | Simple Network Management Protocol collects and manipulates valuable network information. |
| Describe the parts of SNMP. | 1)It collects info at either fixed or random intervals. 2)When all is well, the SNMP "watchdog" collects a baseline. 3)When any aberrations occur, the "watchdogs" send a "trap" to mgmt. |
| What are the versions of SNMP and which should be used? | There are v1, v2, and v3. For best security and efficiency, use v3. |
| What does SSH do and what is it replacing? | Stands for secure shell. Sets up a secure Telnet connection. It is replacing telnet. |
| What does NTP do? | ensures that all computers on a given network agree on the time. Stands for network time protocol. |
| What is SCP? | Secure Copy Protocol. Uses SSH to transfer files. SFTP should be used instead, though. |
| What is LDAP used for. | Accessing directories. (of users and devices) |
| What is IGMP involved with? | Internet group mgmt protocol is used with IP multicast sessions. Reveals multicast landscape and join/quit an IGMP group. |
| What are some things acquired via DHCP? | IP address, Subnet mask, Domain name, Default gateway (routers) , DNS, WINS information |
| What are the 4 steps of the DHCP process (of getting info)? | DHCP discover msg, DHCP offer, DHCP request, DHCP information. |
| Which has a larger header and why-TCP or UDP? | TCP because it needs to ensure properly delivery of data. |
| Why is UDP called unreliable and connectionless? | Unreliable=no acknowledgements. Connectionless=no virtual circuit. |
| Why use multiple port numbers when transferring data? | to keep track of different simultaneous conversations |
| What number usually delineates well-known port numbers to those dynamically assigned? | 1024 |
| What are the internet layer protocols? What do they stand for? | IP (internet protocol), ICMP (internet control message protocol), ARP (address resolution protocol), RARP (reverse ARP) |
| Describe what IP does essentially? | Looks at the IP address and decides (via routing tables) what the next step should be. |
| What are some common events that use ICMP? | Destination unreachable, buffer full, hop limit, ping, tracert |
| What does ARP do? | finds the hardware address of a host from a known IP address. |
| Describe RARP | When a diskless machine in an IP network needs a MAC address, it asks a RARP server for one (given its IP address). *identity crisis |
| What is the data called at the Transport layer, network layer, data link layer and physical layer. | Some People Fear Birthdays. Segments, Packets, Frames, bits. |
| What does CRC and FCS stand for and what do they do? | Cyclic redundancy check is a math-something for checking data integrity. If it matches with the Frame Check Sequence, the data has assumed integrity and it passes it up to the next layer. |
| Complete the matching task in the notebook. | Did you get it right? |
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