Chap:12 End to End Networking
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An attack in which one or more hosts conspire to inundate a victim with ping requests is called a
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Ping Flood
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Operation Setup Termination
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TCP connections go through three stages
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True or False? The Internet Corporation for Assigned Names and Numbers (ICAAN) manages the distribution of domain names and IP addresses.
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True
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True or False? A dedicated line that connects two remote computers typically uses an asynchronous modem.
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False
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Packet filtering looks at any packet header and filters on these values except:
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Number of Addresses
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The TCP fields that help ensure reliable transmission of data by keeping track of the number of bytes sent and received are
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Sequence Number
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An attack that forges the sender's IP address is called:
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IP Spoofing Attack
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True or False? TCP and UDP provide data transport between hosts.
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True
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A network address translation (NAT) gateway rewrites an outbound packet's header to refer to:
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the gateway's chosen port number the gateway's global IP address
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True or False? The concept that embodies dumb networking by placing most network protocols in the connection's endpoint hosts is the domain name principle
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False
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In the Web site address www.stthomas.edu, the top-level domain is:
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edu
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True or False? The purpose of a gateway firewall is to block potentially hostile traffic from the internal LAN.
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True
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DNS security improvements include
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randomized requests limited access to resolvers distributed DNS servers
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True or False? Hosts behind a network address translation (NAT) gateway are typically assigned local IP addresses
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True
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On the Internet, the entity that looks up a domain name and retrieves information about it is the:
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Domain Name System (DNS)
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The whois database provides the following information except:
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the annual cost to rent the domain name
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To resolve a domain name on the Internet, the DNS resolver first contacts
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the root DNS server
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Issuing the nslookup command along with a domain name displays:
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the corresponding IP address
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The TCP fields that help ensure reliable transmission of data by keeping track of the number of bytes sent and received are
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Acknowledgement number Sequence number
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True or False? The point of DNS redundancy is to provide other servers that can be contacted in the event the main server goes down
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True
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True or False? The purpose of a gateway firewall is to block potentially hostile traffic from the internal LAN
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True
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True or False? A dedicated line that connects two remote computers typically uses an asynchronous modem
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False
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True or False? The Internet Corporation for Assigned Names and Numbers (ICAAN) manages the distribution of domain names and IP addresses.
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True
