Question:* In the Command Prompt, what is the command to show the most detailed printout of IP address info?
Answer: • ipconfig /all
Question:* A server that has HTTP services and SMTP services bound to an interface functions with what protocol?
Answer: • TCP
Question:* The name of unit exchanged at network layer is called:
Answer: • Packets
Question:* Open System Interconnection (OSI) Model has following layers:
Answer: • 7
Question:* When can a wireless device NOT connect to a wireless network?
Answer: • All of these.
Question:* Is it possible for a computer on local network A to talk to a computer on a local network B?
Answer: • Yes only if an entry-point (such as a router) for each local network is provided.
Question:* Which command will display the assigned IP address of a network adpater installed on a Windows XP system?
Answer: • Ipconfig
Question:* Which of the following is NOT a protocol?
Answer: • PP
Question:* Which of the following is a connection oriented protocol?
Answer: • TCP
Question:* Is it possible to connect two computers without using any hubs or routers for network communication?
Answer: • Yes, using a cross-over cable.
Question:* Can computers with different operating systems communicate over a network?
Answer: • Yes, network communication is operating system independent. What is important is if the computers are using the same protocol.
Question:* What is NIC?
Answer: • Network Interface Card
Question:* What type of network is commonly used in houses?
Answer: • LAN
Question:* Which of the following is an Ethernet connector type?
Answer: • RJ-45
Question:* Port number of HTTP is:
Answer: • 80
Question:* How many layers are there in the OSI model?
Answer: • 7
Question:* What is bandwidth?
Answer: • Transmission rate.
Question:* Which is the best example of a secure password?
Answer: • MySpecialPa$$w0rd
Question:* Which of the following is not a network topology?
Answer: • Access
Question:* A firewall in a Computer Network is a
Answer: • system to prevent unauthorized access.
Question:* Which is example of wireless encryption?
Answer: • WPA
Question:* TCP is a ___ protocol.
Answer: • Connection Oriented
Question:* Which of the following is NOT an example of a client/server?
Answer: • Peer-to-Peer between hosts.
Question:* What is a MAC address?
Answer: • A unique hardware identification number for a network card.
Question:* What is a handshake?
Answer: • The intial set-up between two communicating hosts.
Question:* Which protocol is used for email transmission?
Answer: • IMAP
Question:* ADSL stands for:
Answer: • Asymmetric digital subscriber line
Question:* What is currently the most common and fastest transmission rate for ethernet cables?
Answer: • Gigabit
Question:* What technology exists that allows a non-routable IP address to communicate with the global IP Internet Network.
Answer: • NAT (Network Address Translation)
Question:* Which one is connectionless protocol?
Answer: • UDP
Question:* Which IP address is reserved for loopback testing and debugging?
Answer: • 127.0.0.1
Question:* Which of the following is NOT an application layer protocol for email?
Answer: • TCP
Question:* What is the purpose of a static IP?
Answer: • To gaurantee the IP of the computer/server will not change.
Question:* Which of the network type covers the country level location:
Answer: • Wide area Network
Question:* What is the maximum supported distance for an Ethernet cable run?
Answer: • 100m / 328 ft
Question:* The process in which information packets are forwarded to hops is called:
Answer: • Routing
Question:* Which of the following describes how two communicating parties exchange information?
Answer: • Protocols
Question:* Can a computer also act as a router?
Answer: • Yes
Question:* When you connect two network switches or two computers directly what type of Ethernet cable do you need?
Answer: • Cross-over
Question:* Is it possible to program at the socket level?
Answer: • Yes
Question:* What is the purpose of an IP?
Answer: • To uniquely identify a host computer on a network.
Question:* Which item is an example of a physical network address?
Answer: • MAC address
Question:* A user loads a web browser and browses to http://www.google.com, what is the highest layer of the OSI model the user is functioning at?
Answer: • Application Layer
Question:* How is data transferred over a network?
Answer: • Through chunks called packets.
Question:* What is the normal reach of a signal from a wireless router?
Answer: • Depends on the physical constructs of the environment, e.g., walls.
Question:* FTP client contacts FTP server at port:
Answer: • 21
Question:* Which device is the central device of star topology?
Answer: • Hub/Switch
Question:* What is the difference between network address and port number?
Answer: • Network address resolve the address of hardware device and port number search and identify software application.
Question:* UDP is an unreliable protocol.
Answer: • True
Question:* What is the maximum Ethernet cable length between repeaters (computers or switches)?
Answer: • 100 m (328 feet)
Question:* Which of the following major networks contain an incorrect subnet mask?
Answer: • Class D with a mask 255.255.255.255 or /32
Question:* Print server uses ________ which is a buffer that holds data before it is send to the printer.
Answer: • Spool
Question:* What is considered part of a network core?
Answer: • Routers
Question:* What is a protocol?
Answer: • A protocol defines the order and format of messages within a network.
Question:* What best describes a client/server model?
Answer: • A client host requests a service from an always-on server.
Question:* IPv6 address space is:
Answer: • 2^128
Question:* Hub is a ----------- device.
Answer: • Broadcast
Question:* When using the PING utility, what are you trying to accomplish?
Answer: • Does connectivity exist between two IP end points
Question:* Which service reduce the response time for client request and satisfy client request without involving origin server.
Answer: • Web Caching(Proxy Server)
Question:* Which service reduce the response time for client request and satisfy client request without involving origin server.
Answer: • Web Caching(Proxy Server)
Question:* Technically, what is the difference between HUB and Switch?
Answer: • Hub operate using a broadcast model and switches operate using a virtual circuit model
Question:* Which of the given TCP/IP protocols can assign a logical address to a host?
Answer: • IP
Question:* Which IPv4 address is not valid?
Answer: • 25.740.265.70
Question:* Given the IP address 82.77.201.1/24, what is the network number?
Answer: • 82.77.201.0
Question:* ____ protocol is used by Telnet.
Answer: • TCP
Question:* Which switching type has the re-route capability:
Answer: • Packet Switching
Question:* IP Addresses are 48 bit addresses and MAC addresses are 32 bit addresses written in hexadecimal format
Answer: • False
Question:* Which network topology is based on a hierarchy of nodes?
Answer: • Tree
Question:* What fields in the header of an IP packet will be decremented by one that is passed through each router?
Answer: • The Time to Live (TTL)
Question:* If you wanted to test to see if a TCP port was opened on a server, what command/tool would you use?
Answer: • Telnet
Question:* What is the second layer (layer 2) of the OSI model?
Answer: • Data Link
Question:* Which is NOT a wireless network signal?
Answer: • C
Question:* What does the term "Map Network Drive" mean?
Answer: • Create a shortcut to a network location.
Question:* Which are the default settings for a Windows XP computer network adapter?
Answer: • DHCP and configured as part of a workgroup.
Question:* Skype is an example of:
Answer: • peer-to-peer model (Hybrid)
Question:* In TCP/IP model, TCP and UDP protocols work on which layer:
Answer: • Transport layer
Question:* In IPv4 addresses, how many addresses are available?
Answer: • 2^32
Question:* Which network type can have transmission of data in both directions but not simultaneously.
Answer: • Half Duplex
Question:* Which of the following IP addresses is a class A Network?
Answer: • 0.0.0.1
Question:* Who initiates a connection between a client and server?
Answer: • Client
Question:* The name of unit exchanged at Data Link Layer is called:
Answer: • Frames
Question:* What does an assigned IP addres 169.254.0.12 indicate?
Answer: • The computer is configured for DHCP and cannot connect to the DHCP server
Question:* What is the subnet mask of this network: 192.168.0.0/29
Answer: • 255.255.255.248
Question:* Does P2P require an always on server?
Answer: • No
Question:* What or who is responsible for top-level country domains such as uk, ca, and jp?
Answer: • Top-level domain (TLD) servers.
Question:* Which of the following is/are NOT the difference between TCP and UDP?
Answer: • All of them are correct
Question:* For 802.11b wireless, how many frequency channels are available to avoid collisions/interference?
Answer: • 11
Question:* What is the maximum speed of a wireless G network?
Answer: • 54Mbps
Question:* TCP contains fields in the header of TCP Segment to identify upper layer applications, what are these fields?
Answer: • Source and Destination Port Numbers
Question:* A router that responds to an ARP request intended for a remote host is called what?
Answer: • Proxy ARP
Question:* You are a Network Administrator for the ACME company; one of your webservers had a hardware issue, so you moved the IP address (192.168.1.99) to another webserver. Users from other networks are reporting that they still are not able to access the website. You are able to access the website locally; What is the best answer that will fix the issue.
Answer: • Clear the ARP Cache on the router
Question:* Which topology uses terminators?
Answer: • BUS
Question:* What is the purpose of caching?
Answer: • To help manage requests by clients so servers are not overloaded.
Question:* What is the purpose of the ARP (Address Resolution Protocol)?
Answer: • Resolves an IP address to a MAC address
Question:* Is a DNS required for hosting a website?
Answer: • No, but that means there will be no translation from hostname to IP address.
Question:* Does wireless always mean mobility?
Answer: • No
Question:* What is the primary Layer 3 protocol in the TCP/IP suite?
Answer: • IP
Question:* In what Operating System(s) are sockets file descriptors?
Answer: • Unix and Mac OSX
Question:* Variability of packet delays within the same packet stream is called
Answer: • Jitter
Question:* Your ISP has given you a block of addresses: 199.200.199.0/25; how many IP addresses are available for devices on a network.
Answer: • 126
Question:* TCP contains several features that benefit the protocol, which of the following answers is not a feature?
Answer: • Low overhead
Question:* If a maximum MTU was set to 1300 in the Windows Vista operating system, what would be the smallest packet you can send if you utilize the PING command with the Don't Fragment bit option set?
Answer: • 1272
Question:* A subset of machines receive and process the packets, this type of addressing is called:
Answer: • Multicast
Question:* In WLAN, the problem of a station not being able to detect a potential competitor because of being distant is the
Answer: • Hidden Station Problem
Question:* When a host is generating an ARP packet, what is unknown?
Answer: • The Target’s Ethernet Hardware Address
Question:* Which topology has a single point failure, i.e. One cable broken whole network is off.
Answer: • Bus
Question:* IPv4 addresses are divided into how many classes?
Answer: • 5
Question:* There are 5 class of IPv4 addresses, what are the class D addresses used for?
Answer: • Multicast
Question:* At layer 4, what port is reserved for TFTP and what protocol is used?
Answer: • 69, UDP
Question:* There are two access points (wireless routers) A and B that belong to the same subnet. What happens when a mobile device connected to A leaves A's range and enters B's range?
Answer: • The mobile device connects to the new access point B and keeps the same IP address.
Question:* Which of the following protocol belongs to "Exterior Gateway Protocol"?
Answer: • BGP
Question:* Is a socket controlled at the application level in an operating system?
Answer: • Yes
Question:* What command to view routing table in Windows
Answer: • route print
Question:* Which of the following documents detail address allocation for private internets?
Answer: • RFC 1918
Question:* Which of the following is a rfc1918 address?
Answer: • 10.70.40.103
Question:* Which wireless standard is designed for a maximum data tranfer rate of 11 Mb?
Answer: • IEEE 802.11b
Question:* The TCP 3-Way handshake contains three messages that are exchange between two hosts before any application data is transmitted, what does a SYN-ACK message indicate?
Answer: • Second message of a 3-Way handshake
Question:* Layer 4 of the OSI model contains the TCP and UDP protocols, what is FALSE about UDP?
Answer: • Does not contain any port numbers
Question:* How many layers does a TCP/IP Protocol stack have?
Answer: • 4
Question:* What does RFC1918 provide?
Answer: • 3 ranges of non-routable addresses to use for private networks.
Question:* What debugging tool would you use to troubleshoot TCP connections from client to a server that was experiencing slow transfers and intermittent connectivity?
Answer: • Wireshark/TCPDump
Question:* Which is NOT a transport layer protocol?
Answer: • SMTP
Question:* Which layer of the OSI model is responsible for establishing, managing, and terminating communications between two computers?
Answer: • Session
Question:* What are the two sub layers of the Data Link layer of the OSI model?
Answer: • MAC and LLC
Question:* Which method of communication is used to support Ethernet type networks?
Answer: • Broadcast
Question:* What layer of the OSI model does ICMP work on ?
Answer: • Layer 3
Question:* Which of the following cable types is most susceptible to cross talk?
Answer: • UTP
Question:* Which of the following is an example of a Class B network address?
Answer: • 163.4.2.1
Question:* What is the IP protocol number of TCP?
Answer: • 6
Question:* Which multiplexing allows an optical fibre to carry multiple optical signals simultaneously
Answer: • WDM
Question:* An IPv4 header contains a Time To Live (TTL) field, what is the purpose of TTL?
Answer: • To prevent routing loops
Question:* You were given a network address of 67.230.100.64/27 from your ISP, what would the broadcast address be?
Answer: • 67.230.100.95
Question:* What is binary 00011000.01001100.00001010 equivalent to in Decimal?
Answer: • 24.76.10
Question:* For UPD/IP or TCP/IP socket communication, what four parameters are generally needed?
Answer: • Source Identifyer, Source Port, Destination Identifier, and Destination Port
Question:* Which of the following high-speed circuits is the fastest?
Answer: • DS3
Question:* An IP header contains a "Blank" field that identifies the type of data that is encapsulated in an IP Packet.
Answer: • The Protocol Number
Question:* How does a host determine that an IP address is not located on the local network?
Answer: • "The ANDing process"
Question:* You have a network address of 192.168.56.0 with four subnets. You want to allow for maximum number of Hosts. What is the subnet mask you need to apply?
Answer: • 255.255.255.192
Question:* Which of the following is the decimal and hexadecimal equivalents of the binary number 01101101?
Answer: • 109, 6D
Question:* 138.19.50.0/27 provides how many subnets (including the all 0 and 1s subnet)?
Answer: • 8
Question:* What is packet switching?
Answer: • A networking model where a computer shares networking resources for transmission.
Question:* Assuming no PPP compression, standard network MTU of 1500, an IP packet that contains a TCP segment with TCP timestamps and is encapsulated in a Ethernet frame with no 802.1q tags, what would the data rate efficiency be?
Answer: • 94.1482%
Question:* How many collision domains exist on an 8 port hub?
Answer: • 1
Question:* What is circuit switching?
Answer: • A networking model where a computer is assigned dedicated network resources for transmission
Question:* Which of the following is not a layer of the three tier hierarchical model?
Answer: • Server
Question:* What is the Subnet Mask of this CIDR Block 123.45.67.89/29?
Answer: • 255.255.255.248
Question:* Which layer provide end-to-end delivery:
Answer: • Network layer
Question:* If you are able to browse to a website by IP address but not URL, which of these would NOT be the cause?
Answer: • The wireless networking capability on your computer is turned off.
Question:* What is the IEEE standard for Ethernet?
Answer: • 802.3
Question:* How many collision domains exist on a 24 port switch?
Answer: • 24
Question:* The default MTU of a typical Ethernet is
Answer: • 1500
Question:* Where is a hub specified in the OSI model?
Answer: • Physical layer
Question:* A network with more than one exit point.
Answer: • different networks could communicate.
Question:* Which protocol is used to send a destination network unknown message back to originating hosts?
Answer: • ICMP
Question:* What is a stub network?
Answer: • A network that has only one entry and exit point.
Question:* Which protocol does DHCP use at the Transport layer?
Answer: • UDP
Question:* What protocol does PPP use to identify the Network layer protocol?
Answer: • NCP
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