network exam

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

d)

what type of route is indicated by the code C in an IPv4 routing table on a cisco router? a)static route b) default route c) directly connected route

c)

The ethernet __________ sublayer is resposible for communicating with physical layer a) Ip b) LLC c) MAC

c) MAC

What destination address is used in an ARP request frame: a) 0.0.0.0 b) 255.255.255.255 c) ffff.ffff.ffff d) 127.0.0.1

c) ffff.ffff.ffff

general term for a piece of data at any point of the OSi layers a) packet b) bit c) pdu

c) pdu - protocol data unit

ROM memory stores which of the following a) running config file b)arp tables c) startup-config file d) bootup instructions

d)

what type of message is sent to a specific group of hosts a) unicast b) multicast c) broadcast

b)

what are the MAC and LLC sublayers of ethernet over the data link layer

LLC handles communication between upper and lower layers, adds control infromation to network protocol data, to help deliver packet to the destination. MAC is implemented primarily into the computers NIC, primary responsibilities are data encapsulation and media access control

How is ssh different from telnet

SSH provides security to remote sessions by encrypting messages and user authentication. Telnet is considered insecure using plaintext files

what is true about a client-server network? a) The network includes a dedicated server. b) Each device can function as a server and a client. c) Workstations access network resources using SAMBA or Gnutella. d) Each peer accesses an index server to get the location of a resource stored on another peer in what is considered a hybrid network system.

a)

what are the two sizes min and max of an ethernet frame: a) 56 bytes b) 64 bytes c) 128 bytes d) 1024 bytes e) 1518 bytes

b) 64 (min) e) 1518 (max)

what are the benefits of IPv6 - increased ------ ----- - improved ----- ------ Eliminates the need for --- - Integ----- ------

increased address space improved packet handling eliminateds the need for nat integrated security

Admin changes IP interface of an IOS device - what else needs to be done a)save r s b)nothing c) copy r s

b)

Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.) a) TCP b) HTTP c) MPEG d) GIF e) IP f) UDP

b) c) d)

match the terms 1) store & forward 2) cut through 3) fast forward 4) fragment-free switching a) lowest level latency, immediately forwards after reading address b) switch stores first 64 bytes of the frame before forwarding c) forwards the frame before it is entirely recieved at minimum, the destination must be read d) receives the entire frame, and computes the crc, if its is valid, the switch looks up the destination address. which determines the out going interface

1 = d 2 = c 3 = a 4 = b

what are the 4 end-to-end transport processes -Add------- --- ------ -En----- - Ro----- - De-e----------

Addressing end devices encapsulation routing de-encapsulation

what is CSMA/CA

In CSMA/CA, as soon as a node receives a packet that is to be sent, it checks to be sure the channel is clear (no other node is transmitting at the time). If the channel is clear, then the packet is sent. If the channel is not clear, the node waits for a randomly chosen period of time, and then checks again to see if the channel is clear.

what are the two TCP/IP protocols

UDP - User datagram protocol provides just the basic functions for delivery with less overhead TCP - Transmission control protocol provides reliable delivery ensuring that all the data arrives at the destination

What type of applications are best suited for using UDP? a) applications that are sensitive to delay b) applications that need reliable delivery c) applications that require retransmission of lost segments d) applications that are sensitive to packet loss

a)

Which command is used to manually query a DNS server to resolve a specific host name? a) nslookup b) ipconfig/ displaydns c)tracert d) ping

a)

what is a function of LLC sublayer a) to identify which network layer protocol is being used b) to identify if a physical address is being addressed to the correct location

a)

RAM memory stores which of the following (select 2) a) running config file b)arp tables c) startup-config file d) IOS

a) and b)

What are two characteristics of IP? (choose two) a) does not require a dedicated end-to-end connection b) operates independently off the network media c) retransmits packets if errors occur d) re-assembles out of order packets into the correct order at the reciever end e) guarantees delivery packets

a) and b)

what are two features of ARP? choose two a) if a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast b) An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address. c) When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses d) if a device recieving an ARP request has the destination IPv4 address, it responds with an ARP reply

a) and c)

when store and forward method of switching, which part of it is error check? a) crc in trailer b) network portion c) host portion

a) crc in trailer

A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.) a) DNS server b) source port number c) http server d) default gateway e) source MAC address

a) d)

what routing table entry has a next hop address associated with a destination network? a)directly connected routes b) local routes c) remote routes

c)

A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. which three statements are correct abut the final result of the connection?(choose 3) a) the link between the switches will work at the fastest speed that is supported by both switches b) the link between switches will work as full-duplex c) if both switches support different speeds, they will each work at their own fastest speed. d) the auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable e) the connection will not be possible unless the administrator changes the cable to a crossover cable

a), b) & d)

name the 7 layers in the osi

application - allows access to network resources presentation - to translate, encrypt and compress data session - to establish, maintai and terminate sessions transport - to provide reliable end-to-end message delivery and recovery network - to move packets from source to destination data link - organize bits into frames physical - to transmit bits over a medium (cables)

what are two potential network problems that can result from ARP operation? a) manually configuring static arp associations could facilitate poisoning or MAC address spoofing b) on large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays c) Network attackers could manipulate MAC address and IP address mapping in ARP messages with the intent of intercepting nework traffic d) large numbers of arp requests broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network

b and c

On a home network, which device is most likely to provide dynamic IP addressing to clients on the home network? a) a dedicated file server b) a home router c) an ISP DHCP server d) a DNS server

b)

Which protocol can be used to transfer messages from an email server to an email client? a) SMTP b) pop3 c) SNMP d) HTTP

b)

following default settings, what is the next step in the router boot sequence after the IOS loads from flash? a) perform the POST routine b) Locate and load the startup-config file from NVRAM c) Load the bootstrap program from ROM

b)

if duplicate ip addresses begin to appear what is an appropriate method to ensure this doesnt happen: a) arp table b) use DHCP to auto assign addresses

b)

what is the layer 2 multicast MAC address that corresponds to the layer 3 IPv4 multicast address 224.139.34.56 a) 00-00-00-0B-22-38 b) 01-00-5E-0B-22-38 c) 01-5E-00-0B-22-38 d) FE-80-00-0B-22-38 e) FF-FF-FF-0B-22-38

b)

what type of cable is used to connect a serial port to a router console port: a) crossover (red) b) rollover (lightblue) c) cate3 (blue)

b)

when a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary? a) connectionless acknowledgements are used to request retransmission b) Upper-layer connection-oriented protocols keep track of the data recieved and can request retransmission from the upper-level protocols on the sending host

b)

A technician is configuring a router that is actively running on the network. suddenly, power to the router is lost. If the technician has not saved the configuration, which two types of information will be lost. a)cisco IOS image file b) routing table c) bootstrap file d) ARP cache e) startup configuration

b) & d)

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.) a) physical layer b) session layer c) transport layer d) application layer e) presentation layer f) data link layer

b) d) e)

NVRAM memory stores which of the following a) running config file b)arp tables c) startup-config file d) IOS

c)

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

c)

Which statement about router interfaces is true? a) Router LA interfaces are not activated by default, but router WAN interfaces are b) once the no shutdown command is given, a router interface is active and operational c)Commands that apply an IP address and subnet mask to an interface are entered in global config mode d)A configured and activated router interface must be connected to another device in order to operare

d)

How can we retrieve the vendor information from a given MAC address: a) mac vendor lookup b) oui lookup c) ip lookup d) a & b

d) a & b

which switching method uses the CRC value in a frame? a) cut-through b) fast-forward c) fragment-free d) store-and-forward

d) store and forward

what is the main reason for data compression

reduce both time and costs associated with transmission

a collison fragment, also known as a __________ frame, is a frame of fewer than 64 bytes

runt