chapter 6 network ex

You need to log in to a Unix server across a network that is not secure. Which of the following protocols will allow you to remotely administrate this server securely?

SSH (secure shell)

What Transport layer protocol does a DNS server use?

TCP and UDP

Which of the following statements are true? (Choose two.)

TCP is a connection-oriented transport portocol. UDP is a connectionless transport protocol.

What well-known port numbers do SMTP, POP3, RDP, and IMAP4 servers use?

TCP port 25, TCP port 110, TCP port 3389, TCP port 143 repectively

Which of the following ports are matched with the correct protocol?

TCP port 53: DNS

What Layer 4 protocol is used for a Telnet connection, and what is the default port number

TCP, 23

Which of the following TCP/IP protocols are used at the Application layer of the OSI model? (Choose three.)

Telnet FTP (file transfer protocal) Trivial FTP (TFTP)

Which statements are true regarding ICMP packets? (Choose two.)

They can provide hosts with information about network problems They are encapsulated within IP datagrams

Which destination Transport layer protocol and port number does a TFTP client use to transfer files over the network

UDP and port 69

Your network is connected to the Internet. As the network administrator, you install packet filtering on the router that connects your network to the Internet. After you configure packet filtering, users on the network are no longer able to download files. What did you do to create this problem

You blocked port 21.

Your network is connected to the Internet. As the network administrator, you install packet filtering on the router that connects your network to the Internet. After you configure packet filtering, users on the network are no longer able to send email outbound to the Internet. What did you do to create this problem?

You blocked port 25

The OSI model has seven layers and the DoD has four. At which layer does SMTP work in both models

application layer

If you can ping by IP address but not by hostname, or FQDN, which of the following port numbers is related to the server process that is involved

both TCU and UDP port 53

What would an ARP destination MAC address appear as?

layer 2 broadcast or FF:FF:FF:FF:FF:FF

what layer IP protocol work at

network layer

You are interviewing for a technology manager's job. The hiring party needs to test your knowledge of TCP/IP troubleshooting commands. She asks, "Which command should you execute if you want the easiest and fastest method of determining whether you have connectivity to the corporate intranet?"

ping

You need to have secure communications using HTTPS. What port number is used by default?

port 443

Which of the following describe the DHCP Discover message? (Choose two.)

send out broadcast at layer 2 : FF:FF:FF:FF:FF:FF and layer 3 broadcase 255.255.255.255 and it is connectionless so it use UDP at transport layer

What could cause a server that you can ping not to provide the particular TCP/IP service,such as FTP, HTTP, and so on, that you expect it to offer?

that server is not currently running or firewall prevent.

what layer TCP ( transmission control protocol) work at

transport layer

Which of the following allows a server to distinguish among different simultaneous requests from the same host

use different port number

Which protocol translates TCP/IP addresses to MAC addresses?

ARP

What protocol is used to find the hardware address of a local device?

ARP (adress resolution protocol)

Which protocol should you use if you want to dynamically assign IP addresses to network clients?

DHCP

Which of the following services use UDP? (Choose three.)

DHCP SNMP TFTP

You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this

DHCP ( Dynamic Host Configuration Protocal)

You have established a wireless network in your SOHO. Your office is in one building, and your laptop, where you monitor your email, is in your home office, which is 75 yards across your yard. There is a clear line of sight between your home and your office. The wireless router is an 802.11g unit, with four LAN ports. It functions as a firewall, NAT server, and DHCP server. Computers in the office never have issues with connectivity. Office computers can access local resources and Internet resources. Your laptop has been having problems accessing office resources and Internet resources. When you take the laptop to the office and connect it with a patch cable, everything works fine. What is the most likely problem?

DHCP configuration information is not being transmitted across the wireless network

Which of the following uses both TCP and UDP?

DNS

Name the protocol that uses both TCP ports 20 and 21.

FTP (file transfer pro)

which protocol is used for web-based mail service

HTTP

What layer in the IP stack is equivalent to the Transport layer of the OSI model?

Host-to-host layer

Which protocol dynamically reports errors to source hosts by using IP directly to build packets?

ICMP (internet control message P )

What protocol is at the heart of the ping and tracert commands in a Windows operating system

ICMP (internet control message P)

You need to make sure that the time is consistent across all your network devices. What protocol do you need to run on your network

NTP ( network time protocol)

which protocol used by client to retrieve mail from server that store it.

POP3 and IMAP

You need to have a connection to run applications that are installed on only your desktop computer at your office. Which protocol will provide a GUI interface to your work computer?

RDP (remote desktop protocol)

You need to transfer files between two hosts. Which two protocols can you use? (Choose two.)

SCP ( Secure Copy Protocol) and FTP (File Transfer Protocol)

Which of the following protocols is used by email servers to exchange messages with one another

SMTP

Which protocol is used to send email messages?

SMTP

Which of the following services use TCP? (Choose three.)

SMTP FTP HTTP

Which of the following protocols can use TCP and UDP, permits authentication and secure polling of network devices, and allows for automated alerts and reports on network devices?

SNMP (Simple Network Management Protocol)

Which ports does the protocol MGCP use?

2427 and 2727 (media gateway control)

What is the well-known port number for RDP?

3389 (remote desktop P)

What is the default TCP port for HTTPS?

443