Chap:12 End to End Networking

Ping Flood
An attack in which one or more hosts conspire to inundate a victim with ping requests is called a
TCP connections go through three stages
Operation
Setup
Termination
True
True or False? The Internet Corporation for Assigned Names and Numbers (ICAAN) manages the distribution of domain names and IP addresses.
False
True or False? A dedicated line that connects two remote computers typically uses an asynchronous modem.
Number of Addresses
Packet filtering looks at any packet header and filters on these values except:
Sequence Number
The TCP fields that help ensure reliable transmission of data by keeping track of the number of bytes sent and received are
IP Spoofing Attack
An attack that forges the sender’s IP address is called:
True
True or False? TCP and UDP provide data transport between hosts.
the gateway’s chosen port number
the gateway’s global IP address
A network address translation (NAT) gateway rewrites an outbound packet’s header to refer to:
False
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
edu
In the Web site address www.stthomas.edu, the top-level domain is:
True
True or False? The purpose of a gateway firewall is to block potentially hostile traffic from the internal LAN.
randomized requests

limited access to resolvers

distributed DNS servers

DNS security improvements include
True
True or False? Hosts behind a network address translation (NAT) gateway are typically assigned local IP addresses
Domain Name System (DNS)
On the Internet, the entity that looks up a domain name and retrieves information about it is the:
the annual cost to rent the domain name
The whois database provides the following information except:
the root DNS server
To resolve a domain name on the Internet, the DNS resolver first contacts
the corresponding IP address
Issuing the nslookup command along with a domain name displays:
Acknowledgement number
Sequence number
The TCP fields that help ensure reliable transmission of data by keeping track of the number of bytes sent and received are
True
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
True
True or False? The purpose of a gateway firewall is to block potentially hostile traffic from the internal LAN
False
True or False? A dedicated line that connects two remote computers typically uses an asynchronous modem
True
True or False? The Internet Corporation for Assigned Names and Numbers (ICAAN) manages the distribution of domain names and IP addresses.