Routers are comprised of the following layers Physical Physical and Data Link Ph

Question

Routers are comprised of the following layers Physical Physical and Data Link Physical, Data Link, and Network Physical, Data Link, Network, and Transport HTTP, SMTP, and FTP reside in which layer: Application Network Transport Data Link How many distinct IP addresses are possible in the entire Internet with IPV4? 2^26 2^32 2^64 Which LINUX file contains information about which services are running at which ports?/etc/services/etc/maps/mnt/services/dev/severs TCP/IP protocol stack is a part of Network device driver Kernel code User application Remote application Which of the following command is used to see the details of a connection (IP address and port number pair) established between the current computer and all remote servers/clients? telnet dig ping Netstat Socket connections are similar to pipe connections in that both use their file descriptors as addresses processes transfer data through both with the read and write system calls A server program uses the bind system call to lock the socket in memory attach an address to its socket A client program makes a connection to a server program by calling socket connect Datagram sockets may be a good choice for transmitting background music for elevators but not so in automated teller machine transactions Yes No

Explanation / Answer

Hi, I have answered first 4 Questions.

Please repost others in separate post.

1)

Ans: C: Physical, Data Link, and Network

Routers – A router is a device like a switch that routes data packets based on their IP addresses. Router is mainly a Network Layer device. Routers normally connect LANs and WANs together and have a dynamically updating routing table based on which they make decisions on routing the data packets. Router divide broadcast domains of hosts connected through it.

2)
Ans: A. Application

Application Layer protocols:
   Remote login to hosts: Telnet
   File transfer: File Transfer Protocol (FTP), Trivial File Transfer Protocol (TFTP)
   Electronic mail transport: Simple Mail Transfer Protocol (SMTP)
   Networking support: Domain Name System (DNS)
   Host initialization: BOOTP
   Remote host management: Simple Network Management Protocol (SNMP), Common Management Information Protocol over TCP (CMOT)

3)
Ans: B.
   Internet Protocol version 4 provides 232 (4,294,967,296) addresses
4)
   Ans: A. /etc/services

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