Overview of TCP/IP applications
Trivial File Transfer Protocol (TFTP)
-A light version of FTP that uses a small amount of memory and has limited functionality. -TFTP is also often used to download firmware or software upgrades to routers, switches, Internet protocol (IP) telephones, and other network devices. RFC 1350 specifies TFTP.
BOOTP (Bootstrap Protocol)
A UDP network protocol that helps diskless workstation computers get an IP address before loading an advanced operating system.
Windows Internet Naming Service (WINS)
A service that manages Microsoft NetBIOS names for a Windows network. This service is becoming obsolete, as Windows has moved to DNS for naming and name service. (13)
Which Simple Network Management Protocol (SNMP) management mode allows us to change a device's characteristics and operating parameters?
Active management
A remote monitoring 2 (RMON2) probe can capture a network segment's performance statistics based on which two of the following? (Choose two.)
Application and ip address
Which three of the following are devices manageable with simple network management protocol (SNMP)? (Choose three.)
Applications. Bridges. Routers.
Which three of the following are Dynamic Host Configuration Protocol (DHCP) address allocation mechanisms? (Choose three.)
Automatic, Dynamic, Manual
MIME-supported data types are:
Binary information—Word processed documents or spreadsheets Graphic images—Graphic Interchange Format (GIF) or Joint Photographic Experts Group (JPEG) files Video—Moving Pictures Expert Group (MPEG) files Audio—Waveform Audio File (WAV) files
How does the Domain Name System (DNS) resolve fully qualified domain names (FQDN) to IP addresses?
By looking up the names in an address mapping database.
In which two ways does a Simple Network Management Protocol (SNMP) agent respond to the management station? (Choose two.)
By responding to the management station's requests for updated data By trapping information that exceeds a set threshold and forwarding the data to the management station
Which file transfer protocol (FTP) command allows you to change directories within a file listing?
CD
Which three of the following are examples of Simple Network Management Protocol (SNMP) router management categories? (Choose three.)
Configuration Security Performance
Which three of the following are common Telnet application uses? (Choose three.)
Connect to an online database, Connect remotely to run a specific application, Connect to a router for network information
Common Telnet Uses
Connecting to a system to use specific programs, such as email and statistics programs Connecting to a networking device for information or configuration purposes Connecting to an online database of information Connecting to an online forum to interact and communicate with other users
Your network Help desk calls and asks you to help troubleshoot an email problem. Several users have complained that when they send email messages with attachments, the recipients reply that the attachments are unreadable. The message body is legible, however. You know that your users encode all attachments using Multipurpose Internet Mail Extension (MIME). Which is the best solution to this problem?
Contact the recipients, and have them use MIME to decode attachments.
The file transfer protocol (FTP) server process can run as which two of the following? (Choose two.)
Daemon, Windows service
To resolve fully qualified domain names (FQDN) to binary IP addresses, resolvers contact which type of TCP/IP application server?
Domain Name System (DNS)
Network News Transfer Protocol (NNTP) allows TCP/IP users to perform which of the following?
Download news articles.
Which two choices are examples of trivial file transfer protocol (TFTP) use? (Choose two.)
Download router upgrades. And Software upgrades to IP telephones.
Which protocol allows clients to locate and download IP addressing and configuration information on an automatically renewable (lease) basis?
Dynamic Host Configuration Protocol (DHCP)
Dynamic Host Configuration Protocol (DHCP)
Dynamically assigns IP address information (for example, IP address, subnet mask, DNS server's IP address, and default gateway's IP address) to network devices.
Which TCP/IP application allows us to transfer files either within a browser or at the command line?
File Transfer Protocol (FTP)
Which best describes why an hypertext transfer protocol (HTTP) server can handle multiple simultaneous connections?
HTTP is stateless, which means the server has no knowledge of previous connections after they are dropped.
Which statement best describes Internet Message Access Protocol (IMAP)?
IMAP allows users to scan email headers and choose email messages to download from the email server.
You are a networking consultant for a major telecommunications firm. They ask you to help them resolve a hacked email problem. It seems that someone is intercepting emails between district offices and inserting pornographic pictures in place of legitimate email attachments. How might you resolve this problem for them?
Implement Secure Multipurpose Internet Mail Extension (S/MIME) encoding on all outbound email attachments.
If a Dynamic Host Configuration Protocol (DHCP) client fails to renew its lease at the 50-percent point, what happens next?
It attempts to obtain a lease at 87.5-percent lease time.
How does secure Multipurpose Internet Mail Extension (S/MIME) protect email from forgery and interception?
It uses digital signatures and public-key encryption techniques.
A file transfer protocol (FTP) server administrator can control server access in which three ways? (Choose three.)
Make only portions of the drive visible, Control read and write privileges, Limit file access
Which three of the following are network management model components for Simple Network Management Protocol (SNMP)? (Choose three.)
Managed devices. Network management station (NMS). Network management protocol.
Simple Network Management Protocol (SNMP) gathers network information from what type of database?
Management Information Base (MIB)
DHCP supports three methods of allocating address and configuration information:
Manual allocation—A network administrator manually matchs the host's MAC-to-IP address in the DHCP database, just like BOOTP. DHCP simply passes this information to the client. Automatic allocation—The DHCP server assigns a permanent IP address to the client. Dynamic allocation—The DHCP server dynamically assigns the client an IP address from a pool of addresses, and limits the time the client can use the assigned address. This time limit is referred to as the "address lease period." Most DHCP implementations use dynamic address allocation.
Which two of the following are examples of email programs? (Choose two.)
Microsoft Outlook and UNIX Sendmail
Which two of the following are Multpurpose Internet Mail Extension (MIME)-supported data types? (Choose two.)
Moving Picture Experts Group (MPEG). , Graphics interchange format (GIF).
Which TCP/IP protocol has us attach a remote device to the local file system by mounting it?
Network File System (NFS)
Which TCP/IP application distributes news articles read from a central database?
Network News Transfer Protocol (NNTP)
The comprehensive TCP/IP includes three major components:
Networks, when taken collectively, are referred to as the Internet. Entire suites of protocols, software, and applications that are standard parts of many operating systems (OS), such as file transfer protocol (FTP) and hypertext transfer protocol (HTTP). Actual networking protocols such as transmission control protocol (TCP), user datagram protocol (UDP), address resolution protocol (ARP), and Internet protocol (IP).
Network Management Modes
Passive management—Simply gathering statistics/information Active management—Changing a device's characteristics and operating parameters Exception management—Being notified only of conditions worthy of some action
Which two protocols deliver email directly to the email client? (Choose two.)
Post Office Protocol version 3 (POP3). Internet Message Access Protocol version 4 (IMAP4).
Network Time Protocol (NTP)
Protocol that gives the current time. UDP 123
How does remote monitoring 2 (RMON2) differ from remote monitoring (RMON)?
RMON2 looks at Layer 3 traffic, while RMON only looks at Layers 1 and 2.
TFTP defines five packet types, each assigned an opcode:
Read request (RRQ)—A client sends an RRQ packet to request a file from the server. RRQ packets use an opcode=1. Write request (WRQ)—A client sends a WRQ packet to request upload to a server. WRQ packets use an opcode=2. Data (DATA)—DATA packets contain the data transferred in a download from the server to the client, or, in the case of an upload, from the client to the server. DATA packets use an opcode=3. Acknowledgment (ACK)—Devices send ACK packets in response to correctly received DATA packets. ACK packets use an opcode=4. Error (ERROR)—An ERROR packet is sent in place of an ACK packet when a transmission error occurs, such as when a packet is lost. ERROR packets use an opcode=5.
Of the five trivial file transfer protocol (TFTP) packet types, which three choices below are TFTP packet types? (Choose three.)
Read request, Write request, Acknowledgement
Which two TCP/IP protocols are used for network management? (Choose two.)
Remote monitoring (RMON). Simple Network Management Protocol (SNMP).
Which TCP/IP application allows users to display locally a remote UNIX host's screen?
Rlogin
Why does Simple Mail Transfer Protocol (SMTP) need additional protocols to carry non-text data as attachments?
SMTP only carries ASCII text characters.
TCP/IP networks use several protocols to manage email across a network, including:
SMTP—Simple Mail Transfer Protocol Uuencode—UNIX-to-UNIX encoding MIME—Multipurpose Internet Mail Extensions S/MIME—Secure Multipurpose Internet Mail Extensions POP—Post Office Protocol IMAP—Internet Message Access Protocol
Which Simple Network Management Protocol (SNMP) sets object values on an agent with it's protocol data units (PDU)?
SetRequest
Which two choices are TCP/IP email protocols? (Choose two.)
Simple Mail Transfer Protocol (SMTP). , Internet Message Access Protocol (IMAP).
Internet email uses which two protocols? (Choose two.)
Simple Mail Transfer Protocol (SMTP). And Post Office Protocol version 3 (POP3).
The RMON1 MIB consists of ten groups:
Statistics: Realtime LAN statistics, e.g., utilization, collisions, cyclic redundancy check (CRC) errors History: History of selected statistics Alarm: Definitions for RMON SNMP traps to be sent when statistics exceed defined thresholds Hosts: Host specific LAN statistics, e.g., bytes sent/received, frames sent/received Hosts top N: Record of N most active connections over a given period Matrix: The sent-received traffic matrix between systems Filter: Defines packet data patterns of interest, e.g., media access control (MAC) address or transmission control protocol (TCP) port Capture: Collect and forward packets matching the Filter Event: Send alerts (SNMP traps) for the Alarm group Token Ring: Extensions specific to Token Ring
Which TCP/IP application allows a network user to remotely log on and manipulate a network device?
Telnet
Which remote monitoring (RMON) group records and stores sample statistics for each monitored interface?
The History Control Group.
Which Simple Network Management Protocol (SNMP) remote monitoring (RMON) extension prepares reports about a group of devices that head a measured parameter's statistical list?
The Host Top N Group.
What happens when the browser application finishes downloading the files necessary to display a web page?
The browser and server drop the connections, and the browser maintains the page and its elements in local memory.
As a result of issuing the file transfer protocol (FTP) DIR command, each file listing entry begins with a "-"; what does the "-" indicate?
The entries are files
What results from trapping data with an Simple Network Management Protocol (SNMP) agent?
The managed device alerts the management station of a threshold violation.
LMHosts
This file resolves NetBios names to IP addresses.
For what purpose would you choose to run the Telnet application?
To configure a router
For what application is file transfer protocol (FTP) an excellent choice?
To download large files.
When might you use the rlogin TCP/IP application?
To remotely connect one UNIX workstation to another.
Which is the best reason to use the file transfer protocol (FTP) application?
When you need to pass large files over a slow connection
Which name resolution technique dynamically resolves Windows host names to IP addresses?
Windows Internet Naming Service (WINS).
Simple mail transfer protocol (SMTP) is which type of message delivery system?
direct delivery
Which Dynamic Host Configuration Protocol (DHCP) network address allocation mechanism assigns a host a temporary IP address?
dynamic
If you want to locate a previously saved Uniform Resource Locator (URL) so that you can quickly return to it as needed, where on the browser toolbar would you look?
favorites
Which is a valid email address?
When a management station polls a device agent process to collect information, the network management system is operating in which Simple Network Management Protocol (SNMP) network management mode?
passive
Remote monitoring (RMON) uses which devices, placed on remote network segments, to gather network information?
probes
Which TCP/IP UNIX specific application would allow us to connect to a remote database over the network, but restrict database activity to the remote host?
rlogin
Domain Name System (DNS)
the system responsible for translating domain names like example.com into IP addresses
Which Simple Network Management Protocol (SNMP) protocol data unit (PDU) notifies the management station of the occurrence of a significant event?
trap
Network News Transfer Protocol (NNTP)
used to distribute, retrieve, and post news articles using the reliable services of transmission control protocol (TCP). NNTP allows for the central storage of news articles, which can be selectively and individually downloaded to a newsreader client.
Simple Mail Transfer Protocol (SMTP)
— SMTP is the Internet standard protocol for transferring email messages from client to server or from mail server to mail server. Unlike other communication protocols that use binary codes in structured fields, SMTP uses plain English headers. SMTP defines a protocol and set of protocol processes to transfer email messages between mail systems; it does not define the programs used to store and retrieve mail messages. In fact, although a basic mail "reader" program is included with TCP/IP on virtually every OS, many different mail readers have been developed. RFC 5321 defines SMTP.
Internet Message Access Protocol version 4 (IMAP4)
—IMAP4 is an email protocol that offers enhancements to POP3 for Internet message retrieval. IMAP4 allows users to create and manage mail folders over the network, scan message headers while they remain on the server, and download only those messages they choose. This precludes the need for subscribers to transfer messages between clients when accessing messages both locally and remotely. RFC 3501 describes IMAP4rev1.
Post Office Protocol (POP3)
—POP3 contacts a POP3-aware server to request mail be downloaded for storage on the local client. POP3 stores the incoming email until the server authenticates a client mail application and downloads the messages to the client. RFC 1939 defines POP3.
