Module 15 Test Question

Which application layer protocol uses message types such as GET, PUT, and POST DNS DHCP SMTP HTTP POP3

HTTP (pg. 28)

Which applications use the Gnutella protocol?

Wireshare, Bearshare, and Shareaza (pg. 17)

Can a device act as both a client and server within the same communication?

Yes, in a peer-to-peer (P2P) model (pg. 16)

A client creates a packet to send to a server. The client is requesting POP3 service. What number will be used as the destination port number in the sending packet? 53 67 110 69

110 (pg. 49)

A client creates a packet to send to a server. The client is requesting SNMP service. What number will be used as the destination port number in the sending packet? 110 443 161 80

161 (pg. 51)

A client creates a packet to send to a server. The client is requesting FTP service. What number will be used as the destination port number in the sending packet? 80 69 67 21

21 (pg. 46)

A client creates a packet to send to a server. The client is requesting SSH service. What number will be used as the destination port number in the sending packet? 443 22 67 80

22 (pg. 47)

A client creates a packet to send to a server. The client is requesting telnet service. What number will be used as the destination port number in the sending packet? 23 443 161 110

23 (pg. 50)

A client creates a packet to send to a server. The client is requesting SMTP service. What number will be used as the destination port number in the sending packet? 443 25 161 110

25 (pg. 52)

A client creates a packet to send to a server. The client is requesting HTTPS service. What number will be used as the destination port number in the sending packet? 443 161 110 80

443 (pg. 53)

A client creates a packet to send to a server. The client is requesting TFTP service. What number will be used as the destination port number in the sending packet? 69 67 53 80

69 (pg. 45)

A client creates a packet to send to a server. The client is requesting HTTP service. What number will be used as the destination port number in the sending packet? 80 67 53 69

80 (pg. 48)

What is an example of a network communication that uses the client-server model? A user uses eMule to download a file that is shared by a friend after the file location is determined A workstation initiates an ARP to find the MAC address of a receiving host A user prints a document by using the printer that is attached to a workstation of a coworker A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser

A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser (pg. 11)

What are common P2P (peer-to-peer) applications?

BitTorrent, LionShare, Bitcoin (pg. 17)

What do the client/server and peer-to-peer network models have in common? Both models have dedicated servers Both models support devices in server and client roles Both models require the use of TCP/IP-based protocols Both models are used only in the wired network environment

Both models support devices in server and client roles (pg. 14)

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher? Peer-to-peer Master-slave Client/server Point-to-point

Client/server (pg. 12)

What are two characteristics of peer-to-peer networks? Scalability One way data flow Decentralized resources Centralized user accounts Resources sharing without a dedicated server

Decentralized resources Resource sharing without a dedicated server (pg. 15)

A manufacturing company subscribes to a certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? FTP HTTP DNS SNMP DHCP SMTP

FTP HTTP SMTP (pg. 27)

Which three protocols operate at the application layer of the TCP/IP model? ARP TCP UDP FTP POP3 DHCP

FTP POP3 DHCP (pg. 6)

What is GET used for?

For the server to request HTML pages (pg. 22)

What are the three primary functions of the presentation layer?

Formatting, compression, and encrypting. (pg. 7)

What does the application layer do?

Provides interface between the applications used to communicate, and the underlying network over which messages are transmitted. (pg. 4)

What is an advantage of SMB over FTP? Only with SMB can data transfers occur in both directions Only SMB establishes two simultaneous connections with the client, making the data transfer faster SMB is more reliable than FTP because SMB uses TCP and FTP uses UDP SMB clients establish a long-term connection to the server

SMB clients can establish a long-term connection to the server (pg. 43)

What are the email protocols used for operation?

SMTP (Simple Mail Transfer Protocol) - used to send mail POP3 (Post Office Protocol) and IMAP - used for clients to receive mail (pg. 23)

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? Physical Session Network Presentation Data link Transport Application

Session Presentation Application (pg. 5)

What does a peer-to-peer (P2P) network allow?

Sharing resources without having a dedicated server (pg. 13)

Which three statements describe a DHCP Discover message? The source MAC address is 49 ones (FF-FF-FF-FF-FF-FF) The destination IP address is 255.255.255.255 The message comes from a server offering an IP address The message comes from a client seeking an IP address All hosts receive the message, but only a DHCP server replies Only the DHCP server receives the message

The destination IP address is 255.255.255.255 The message comes from a client seeking an IP address All hosts receive the message, but only a DHCP server replies (pg. 38)

What type of information is contained in a DNS MX record? The FQDN of the alias used to identify a service The UP address for an FQDN entry The domain name mapped to mail exchange servers The IP address of an authoritative name server

The domain name mapped to mail exchange servers (pg. 32)