Cisco Networking: Modules 14-15 Check Your Understandings
Which of the following is displayed by the nslookup utility? a) the configured default DNS server b) the IP address of the end device c) all cached DNS entries
a) the configured default DNS server
How many connections are required by FTP between client and server? a) 1 b) 2 c) 3 d) 4
b) 2
Which two are protocols that belong in the OSI application layer? a) PNG b) DNS c) SMTP d) QuickTime
b) DNS c) SMTP
True or false? DHCP clients send a DHCP request message to available DHCP servers. a) True b) False
b) False
Which control bit flags are used during the three-way handshake? a) ACK and FIN b) FIN and RESET c) RESET and SYN d) SYN and ACK
d) SYN and ACK
Which two applications would use the UDP transport layer protocol? (Choose two.) a) FTP b) HTTP c) ICMP d) TFTP e) VoIP
d) TFTP e) VoIP
What happens when a sending host senses there is congestion? a) The receiving host increases the number of bytes it sends before receiving an acknowledgment from the sending host. b) The receiving host reduces the number of bytes it sends before receiving an acknowledgment from the sending host. c) The sending host increases the number of bytes it sends before receiving an acknowledgment from the destination host. d) The sending host reduces the number of bytes it sends before receiving an acknowledgment from the destination host.
d) The sending host reduces the number of bytes it sends before receiving an acknowledgment from the destination host.
Which of the following is a stateless best-effort delivery transport layer protocol? a) ICMP b) IP c) TCP d) UDP
d) UDP
This is a function of the OSI session layer. a) compress and decompress data b) provide an interface between applications c) format data for the application layer d) exchange of information to initiate dialog between peers
d) exchange of information to initiate dialog between peers
How many exchanges are needed to end both sessions between two hosts? a) one exchange b) two exchanges c) three exchanges d) four exchanges e) five exchanges
d) four exchanges
Which port group includes port numbers for FTP, HTTP, and TFTP applications? a) dynamic ports b) private ports c) registered ports d) well-known ports
d) well-known ports
What field is used by the destination host to reassemble segments into the original order? a) Control Bits b) Destination Port c) Sequence Number d) Source Port e) Window Size
e) Window Size
Which layer is responsible for establishing a temporary communication session between the source and destination host applications? a) application layer b) data link layer c) network layer d) physical layer e) transport layer
e) transport layer
Which of these ports are used by FTP? (Choose two.) a) 20 b) 21 c) 25 d) 110
a) 20 b) 21
Which two applications would use the TCP transport layer protocol? (Choose two.) a) FTP b) HTTP c) ICMP d) TFTP e) VoIP
a) FTP b) HTTP
This protocol is used by a web browser to establish a connection to a web server. a) HTTP b) SSL c) IMAP d) SMTP
a) HTTP
Which UDP header statement is true? a) It consists of 4 fields in an 8-byte header. b) It consists of 8 fields in a 10-byte header. c) It consists of 10 fields in a 20-byte header. d) It consists of 20 fields in a 40-byte header.
a) It consists of 4 fields in an 8-byte header.
Which of the following DNS resource record types resolves authoritative name servers? a) NS b) A c) MX d) AAAA
a) NS
True or false? FTP data transfers take place from client to server (push) and from server to client (pull). a) True b) False
a) True
True or false? In a peer-to-peer network environment every peer can function as both a client and a server. a) True b) False
a) True
Which of the following is a feature of the Gnutella protocol? a) Users can share whole files with other users. b) Users can share pieces of files with other users. c) Users can access an index server to get the location of resources shared by other users.
a) Users can share whole files with other users.
This layer of the OSI model is concerned with the protocols that exchange data between programs running on hosts. a) application b) transport c) network d) physical
a) application
These three OSI layers define the same functions as the TCP/IP model application layer. a) application b) presentation c) session d) transport e) network f) data link
a) application b) presentation c) session
Which three are transport layer responsibilities? (Choose three.) conversation multiplexing a) identifying frames b) identifying routing information c) segmenting data and reassembling segments d) tracking individual conversations e) tracking individual conversations
a) identifying frames d) tracking individual conversations e) tracking individual conversations
Which two fields are the same in a TCP and UDP header? (Choose two.) a) Control bits b) Destination port number c) Sequence number d) Source port number e) Well-known port number
b) Destination port number d) Source port number
True or false? A DNS server that receives a request for a name resolution that is not within its DNS zone will send a failure message to the requesting client. a) True b) False
b) False
True or false? HTTP is a secure protocol. a) True b) False
b) False
True or false? Resource sharing over SMB is only supported on Microsoft operating systems. a) True b) False
b) False
True or false? The peer-to-peer networking model requires the implementation of a dedicated server for data access. a) True b) False
b) False
Why is UDP desirable for protocols that make a simple request and reply transactions? a) Flow Control b) Low overhead c) Reliability d) Same-order delivery
b) Low overhead
This message type is used when uploading data files to a web server. a) GET b) POST c) PUT
b) POST
This protocol is used by a client to send email to a mail server. a) POP b) SMTP c) IMAP d) HTTP
b) SMTP
Which UDP datagram reassembly statement is true? a) UDP does not reassemble the data. b) UDP reassembles the data in the order that it was received. c) UDP reassembles the data using control bits. d) UDP reassembles the data using sequence numbers.
b) UDP reassembles the data in the order that it was received.
MKV, GIF, and JPG standards are associated with which OSI layer? a) application b) presentation c) session d) transport
b) presentation
Assume a host with IP address 10.1.1.10 wants to request web services from a server at 10.1.1.254. Which of the following would display the correct socket pair? a) 1099:10.1.1.10, 80:10.1.1.254 b) 10.1.1.10:80, 10.1.1.254:1099 c) 10.1.1.10:1099, 10.1.1.254:80 d) 80:10.1.1.10, 1099:10.1.1.254
c) 10.1.1.10:1099, 10.1.1.254:80
Which of the following DNS record types is used to resolve IPv6 addresses? a) A b) NS c) AAAA d) MX
c) AAAA
Which peer-to-peer application allows users to share pieces of many files with each other at the same time? a) Hybrid b) Gnutella c) BitTorrent
c) BitTorrent
Which TCP header statement is true? a) It consists of 4 fields in an 8-byte header. b) It consists of 8 fields in a 10-byte header. c) It consists of 10 fields in a 20-byte header. d) It consists of 20 fields in a 40-byte header.
c) It consists of 10 fields in a 20-byte header.
Which is a feature of IMAP? a) It uploads email messages to a server. b) It listens passively on port 110 for client requests. c) It downloads a copy of email messages leaving the original on the server.
c) It downloads a copy of email messages leaving the original on the server.
Which of the following would be valid source and destination ports for a host connecting to an email server? a) Source: 25, Destination: 49152 b) Source: 80, Destination: 49152 c) Source: 49152, Destination: 25 d) Source: 49152, Destination: 80
c) Source: 49152, Destination: 25
Which of the following would be valid source and destination ports for a host connecting to a DNS server? a) Source: 53, Destination: 49152 b) Source: 1812, Destination: 49152 c) Source: 49152, Destination: 53 d) Source: 49152, Destination: 1812
c) Source: 49152, Destination: 53
Which transport layer protocol ensures reliable same-order delivery? a) ICMP b) IP c) TCP d) UDP
c) TCP
Which transport layer protocol statement is true? a) TCP has fewer fields than UDP. b) TCP is faster than UDP. c) UDP is a best-effort delivery protocol. d) UDP provides reliability.
c) UDP is a best-effort delivery protocol.
Which transport layer protocol would be used for VoIP applications? a) Session Information Protocol (SIP) b) Transmission Control Protocol (TCP) c) User Datagram Protocol (UDP) d) VoIP Transfer Protocol
c) User Datagram Protocol (UDP)
Which Windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state? a) ipconfig /all b) ping c) netstat d) traceroute
c) netstat
