Networking Basics 15 -17
Which protocol is used to transfer web pages from a server to a client device?
HTTP. The Hypertext Transfer Protocol (HTTP) provides services between a web browser requesting web pages and a web server responding to the requests. HTML (Hypertext Markup Language) is a markup language to instruct a web browser how to interpret and display a web page.
Match the port number to the email protocol.
IMAP4 143 SMTP 25 POP3 110
Which two protocols are used in the process of sending and receiving emails? (Choose two.)
POP and SMTP are protocols used for email. POP is Post Office Protocol and is used by clients to retrieve email messages from a server. SMTP is Simple Mail Transfer Protocol and is used by clients to send email messages to a server.
What is the advantage of using SSH over Telnet?
SSH provides secure communications to access hosts.
Which command line utility is used to display active network connections on a PC?
netstat
What two characteristics describe an FTP connection? (Choose two.)
An FTP client is an application that runs on a computer used to push and pull files from a server running an FTP daemon. To transfer files, FTP requires two connections between the client and the server: one for commands and replies and another for the actual file transfer. The client establishes the first connection to the server for control traffic and the second connection for the actual file transfer. This connection is created every time there is a file to be transferred. The client can download a file from or upload a file to the server.
Match the protocol with the function.
Automatically configures hostswith IP addresses DHCP Provides remote access to servers SSH Resolves Interent names to IP addresses DNS
What is a characteristic of UDP?
It provides unreliable delivery of segments.
terms
Nslookup-Directly queries the name server for information on a destination domain. Tracert-Displays the route taken to the destination. Netstat-Displays network connections. Ping-Tests connections to other IP hosts. Ipconfig-Displays IP configuration information.
Which two applications provide virtual terminal access to remote servers? (Choose two.)
Telnet and SSH are two services that provide virtual terminal services to servers. DNS maps a domain name to its IP address. DHCP provides dynamic IP addressing information. SMTP provides email service.
A user is able to ping www.cisco.com by its IP address but cannot browse to www.cisco.com in a browser. What is the possible cause?
The DNS server is not working.
Which protocol operates at the application layer of the TCP/IP model?
The protocols are associated with the following TCP/IP layers: HTTP > application layer TCP > transport layer IP and ICMP > internet layer.
What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC?
if there is connectivity with the destination device
A user needs to find the MAC address on the host PC. Which command line utility can be used to display this information?
ipconfig /all
Which command is used to test network connectivity and provide a response to each packet received by the remote host?
ping
Which command line utility is used to test connectivity to other IP hosts?
ping
What protocol header information is used at the transport layer to identify a target application?
port number
What is the purpose of using a source port number in a TCP communication?
to keep track of multiple conversations between devices
A user who is unable to connect to the file server contacts the help desk. The helpdesk technician asks the user to ping the IP address of the default gateway that is configured on the workstation. What is the purpose for this ping command?
to test that the host has the capability to reach hosts on other networks
What type of port number is assigned by IANA to commonly used services and applications?
well-known port
When is UDP preferred to TCP?
when an application can tolerate some loss of data during transmission
Which statement correctly describes data transmission at the transport layer?
Both UDP and TCP use port numbers.
Which two application layer protocols manage the exchange of messages between a client with a web browser and a remote web server? (Choose two.)
Hypertext Transfer Protocol (HTTP) and HTTP Secure (HTTPS) are two application layer protocols that manage the content requests from clients and the responses from the web server. HTML (Hypertext Mark-up Language) is the encoding language that describes the content and display features of a web page. DNS is for domain name to IP address resolution. DHCP manages and provides dynamic IP configurations to clients.
Which protocol is used by web servers to serve up a web page?
Hypertext Transfer Protocol (HTTP) is a protocol that is used by web servers to serve up a web page.
Which three pieces of information are revealed by the ipconfig command (without the /all switch)? (Choose three.)
IP address subnet mask default gateway
What is an advantage of UDP over TCP?
UDP communication requires less overhead.
A student is sending files from a phone to a computer across a network. Which layer of the TCP/IP model is responsible for reassembling these messages as they are received on the computer?
transport
Which statement is correct about network protocols?
They define how messages are exchanged between the source and the destination.
Which type of applications are best suited to use UDP as the transport layer protocol?
applications that require minimal transmission delay
A technician troubleshooting a network problem has used CLI commands to determine that a computer has not been allocated a correct IP address from the DHCP server. Which command can the technician use to solve this problem?
The command ipconfig /renew will cause the computer to request a new IP address from the DHCP server. The command ipconfig /release will remove the current IP address but will not request a new address. The commands ping and tracert are used to test network connectivity.
At which layer of the TCP/IP model does TCP operate?
transport
