Unit 3 Assignment 1: Networking Models Review Multiple-choice questions 1. B. The network uses standards defined in TCP/IP RFCs, plus other standards. 2. C. Ethernet D. TCP/IP mapping 3.
Two TCP/IP data-link protocols are Ethernet and PPP. c Data-link protocols define addresses that identify devices connected to the underlying physical link. 18. a. It focuses mostly on the network between endpoints, rather than the endpoints. c. IP provides logical addressing and routing services.
* 253, and 254 6. What organization has been given the responsibility for assigning port numbers, sometimes referred to as “Well Known Ports or Registered Ports”? * Internet Corporation for Assigned Names and Numbers (ICANN) 7. Determine the protocol numbers for the protocol names: Port | Application/Protocol | TCP-23 | Telnet | TCP-443 | HTTPS | UDP-53 | DNS | UDP-123 | Network Time Protocol | TCP-110 | POP 3 | TCP-25 | SMTP | TCP-80 | HTTP | UDP-88 | Kerberos | TCP-22 | SSH | UDP-161 | SNMP | 8. What numeric range is commonly referred to as well-known ports?
14. Node - a point at which lines or pathways intersect or branch; a central or connecting point. 15. Internet/the Internet - is a global system of interconnected computer networks that use the standard Internet protocol suite
__________protocols__________ are sets of rules used by communication devices. 3. The _______network_____________ layer of the OSI model is responsible for creating, maintaining, and ending network connections. 4. The __________internet protocol, IP_______________ is the software that prepares a packet of data so that it can move from one network to another on the Internet or within a set of corporate networks.
D. leased lines 2. What is WiMAX designed to do in WAN designs? D. To provide wireless access to fixed locations spanning large areas 3. What does DHCP do in a network? D. It is a protocol used by hosts to dynamically obtain an IP address (and other information) to use for a specified length of time.
2. Determine the protocol numbers for the protocol names: Protocol | NUMBERS | References | IPv4 (Internet Protocol version 4) | 4 | (Protocol Numbers, 2013) | IPv6 (Internet Protocol version 6) | 41 | | TCP (Transmission Control Protocol) | 6 | | UDP (User Datagram Protocol) | 17 | | ICMP (Internet Control Message Protocol) | 1 | | VRRP (Virtual Router Redundancy Protocol) | 112 | | IPSEC ESP (Internet Protocol Encap Security Payload | 50 | | L2TP (Layer Two Tunneling Protocol) | 115 | | OSPF (Open Shortest Path First) | 89 | | EIGRP (Enhanced Interior Gateway Routing Protocol) | 88 | | 3. Determine the correct ICMP type based on the description provided. ICMP Message Description | Type | Code | Echo | 8 | RFC792 | Echo Reply | 0 | RFC792 | Time Exceeded | 11 | 0 – Time to Live exceeded in Transit1 - Fragment Reassembly Time Exceeded | Port Unreachable | 3 | 3 - Port Unreachable | Fragmentation Needed | 3 | 4 - Fragmentation Needed and Don't Fragment was Set | 4. What are the valid ranges of protocol numbers?
The IPX (internet packet exchange) shows up in the third layer of the model. In which is if a device that needs to have communication to it or in a different network then the IPX takes that information and sends it the designation throughout the network. The SPX (Sequenced Packet Exchange) protocol which as the same as IPX is also on layer three so the network is more reliable, datagram connection. The network core Protocol (NCP) is a server routine that is degned to process application requests from Netware (WIKIPEDIA.com). Some of the things that NCP does include file access, printer access, security.
Describe the application layer of the TCP/IP model. (p344) Application layer roughly correspond to the OSI application and presentation layers and includes many protocols. 4. Describe the network interface layer in the TCP/IP model(p 344) Network interface layer roughly equivalent to the OSI data link layer. This layer connects internet protocol to underlying network protocols in the physical layer.
Step 2: If ARP resolution is not there in local cache, the source machine will generate an Address Resolution Protocol (ARP) request message, it puts its own data link layer address as the Sender Hardware Address and its own IPv4 Address as the Sender Protocol Address. It fills the destination IPv4 Address as the Target Protocol Address. The Target Hardware Address will be left blank, since the machine is trying to find that. Step 3: The source broadcast the Address Resolution Protocol (ARP) request message to the local network. Step 4: The message is received by each device on the LAN since it is a broadcast.