Application Layer Services

Which application protocol is used to automatically configure IP addressing information? IMAP DHCP FTP DNS

DHCP Dynamic Host Configuration Protocol (DHCP) is used to automatically configure devices with IP addressing and other necessary information.

Which application protocol is used to resolve web addresses to an IP address? DNS HTTP DHCP SSH

DNS Domain Name System (DNS) resolves internet names to IP addresses.

Which protocol allows a user to type www.cisco.com instead of an IP address to access the web server? DNS FTP HTML HTTP SNMP

DNS Web servers are assigned static IP addresses. They are also registered with domain names so people can remember them easily. However, web servers are connected through their IP addresses. DNS provides the service to map the domain name to its IP address.

What two characteristics describe an FTP connection? (Choose two.) A large file requires more than two connections between the client and the server to successfully download it. The server establishes the first connection with the client to control traffic that consists of server commands and client replies. Files can be downloaded from or uploaded to the server. The client needs to run a daemon program to establish an FTP connection with a server. The first connection established is for traffic control and the second connection is created to transfer a file.

Files can be downloaded from or uploaded to the server. The first connection established is for traffic control and the second connection is created to transfer a file. 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.

Which protocol is used to transfer web pages from a server to a client device? HTML SMTP HTTP SSH POP

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.

Which two application layer protocols manage the exchange of messages between a client with a web browser and a remote web server? (Choose two.) DNS HTTP HTML DHCP HTTPS

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? FTP HTTP IMAP POP

Hypertext Transfer Protocol (HTTP) is a protocol that is used by web servers to serve up a web page.

Which application protocols are used to by clients to retrieve email messages? (Choose two.) DNS FTP IMAP SMTP POP HTTP

IMAP POP Post Office Protocol (POP) and Internet Message Access Protocol (IMAP) are both used by email clients to retrieve email messages.

Which is a feature of IMAP? It listens passively on port 110 for client requests. It downloads a copy of email messages leaving the original on the server. It uploads email messages to a server.

It downloads a copy of email messages leaving the original on the server. IMAP is a protocol for clients to retrieve copies of email messages from an IMAP server. The original messages remain on the server until manually deleted.

Which two protocols are used in the process of sending and receiving emails? (Choose two.) HTTP POP SSH SMTP FTP

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.

This protocol is used by a client to send email to a mail server. HTTP POP SMTP IMAP

SMTP Email clients connect to SMTP servers over port 25 to send email. POP and IMAP are used by clients to receive email. HTTP is used between web browsers and web servers.

What is the advantage of using SSH over Telnet? SSH is easier to use. SSH operates faster than Telnet. SSH provides secure communications to access hosts. SSH supports authentication for a connection request.

SSH provides secure communications to access hosts. SSH provides a secure method for remote access to hosts by encrypting network traffic between the SSH client and remote hosts. Although both Telnet and SSH request authentication before a connection is established, Telnet does not support encryption of login credentials.

Which two applications provide virtual terminal access to remote servers? (Choose two.) SSH DNS DHCP SMTP Telnet

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.

Which statement is correct about network protocols? Network protocols define the type of hardware that is used and how it is mounted in racks. They define how messages are exchanged between the source and the destination. They all function in the network access layer of TCP/IP. They are only required for exchange of messages between devices on remote networks.

They define how messages are exchanged between the source and the destination. Network protocols are implemented in hardware, or software, or both. They interact with each other within different layers of a protocol stack. Protocols have nothing to do with the installation of the network equipment. Network protocols are required to exchange information between source and destination devices in both local and remote networks.

True or False? Text messaging is only available on a smartphone? true false

false False. Text messaging applications are available for a wide variety of operating systems and devices.