Layer 2 framing and equivalent error rate over airborne common data link systems

2015 ◽  
Author(s):  
Jaesin Kim ◽  
Junghun Ryu ◽  
Young-Jae Ryu ◽  
Duck-Chan Han
Keyword(s):  
Error Rate ◽  
Data Link ◽  
Layer 2

Design and Implementation of a Multi-Channel HDLC Protocol Controller Based on FPGA

2011 ◽  
Vol 383-390 ◽  
pp. 6840-6845 ◽  
Author(s):  
Yong Hong Gu ◽  
Wei Huang ◽  
Qiao Li Yang
Keyword(s):  
Error Control ◽  
Data Transfer ◽  
Full Duplex ◽  
Programmable Logic ◽  
Data Link ◽  
Total Cost ◽  
Half Duplex ◽  
Level Data ◽  
Layer 2 ◽  
High Level

To transmit and receive data over any network successfully, a protocol is required to manage the flow. High-level Data Link Control (HDLC) protocol is defined in Layer 2 of OSI model and is one of the most commonly used Layer 2 protocol. HDLC supports both full-duplex and half-duplex data transfer. In addition, it offers error control and flow control. Currently on the market there are many dedicated HDLC chips, but these chips are neither of control complexity nor of limited number of channels. This paper presents a new method for implementing a multi-channel HDLC protocol controller using Altera FPGA and VHDL as the target technology. Implementing a multi-channel HDLC protocol controller in FPGA offers the flexibility, upgradability and customization benefits of programmable logic and also reduces the total cost of every project which involves HDLC protocol controllers.

scholarly journals Security in the data link layer of the OSI model on LANs wired Cisco

2018 ◽  
Vol 3 (CITT2017) ◽  
pp. 106-112
Author(s):  
María Genoveva Moreira Santos ◽  
Pedro Antonio Alcívar Marcillo
Keyword(s):  
Operating System ◽  
Simulation Software ◽  
Virtual Laboratory ◽  
Security Measures ◽  
Data Link ◽  
Link Layer ◽  
Data Link Layer ◽  
Layer 2 ◽  
Network Equipment ◽  
Osi Model

There are no technologies or protocols completely secure in network infrastructures, for this reason, this document aims to demonstrate the importance of configuring security options on network equipments. On this occasion we will focus on the data link layer of the OSI model, which is where controls have begun to be implemented at level of protocols. The tools that are used in the research facilitate the implementation of a virtual laboratory, which consists of a base operating system (windows) in which virtualbox is installed to mount linux mint, which will generate attacks; while in VMware, we installed a virtual machine that allows you to add the image of a switch to our network simulation software (GNS3), which integrates all the components. The tests were able to identify the vulnerabilities in MAC, ARP, VLAN and STP, and then to proceed to patch these security aws. Keeping the setting by default or ignoring the characteristics of network equipment are usually the reasons why these vulnerabilities exist. Finally, it was proved how easy it can be to run an attack and at the same time to implement security measures on the layer 2 of the OSI.

scholarly journals Mitigasi Keamanan Dynamic Host Control Protocl (DHCP) Untuk Mengurangi Serangan Pada Local Area Network (LAN)

2018 ◽  
Vol 3 (2) ◽  
pp. 147
Author(s):  
Tamsir Ariyadi
Keyword(s):  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Data Link ◽  
Link Layer ◽  
Control Protocol ◽  
Data Link Layer ◽  
Network Layers ◽  
Layer 2

Keamanan jaringan telah menjadi perhatian lebih karena pesatnya pertumbuhan dan perluasan Internet. Sementara ada beberapa cara untuk memberikan keamanan pada layer application, transport, atau network layers, data link layer (Layer 2) keamanan belum bisa diterapkan secara maksimal. protokol data link layer yang digunakan dalam Local Area Network (LAN) tidak dirancang dengan keamanan yang secara signature. Dynamic Host Control Protocol (DHCP) adalah salah satu jaringan yang paling banyak digunakan untuk konfigurasi host yang bekerja dalam data menghubungkan lapisan. DHCP rentan terhadap sejumlah serangan, seperti serangan DHCP rogue Server, serangan DHCP Starvation, dan serangan DHCP Snooping. Pembahasan prototype terhadap keamanan jaringan yang disebut Mitigasi Keamanan Dynamic Host Control Protocol (DHCP) Untuk Mengurangi Serangan pada Local Area Network (LAN).

Data Link Layer — Layer 2

1988 ◽  
pp. 62-89
Author(s):  
Peter Boait ◽  
Geoff Neville ◽  
Ruth Norris ◽  
Michael Pickman ◽  
Mark Tolhurst ◽  
...  
Keyword(s):  
Data Link ◽  
Link Layer ◽  
Data Link Layer ◽  
Layer 2

Perceptual Characteristics of Consonant Production in Apraxia of Speech and Aphasia

2019 ◽  
Vol 28 (4) ◽  
pp. 1411-1431 ◽  
Author(s):  
Lauren Bislick ◽  
William D. Hula
Keyword(s):  
Error Rate ◽  
Error Rates ◽  
Group Differences ◽  
Diagnostic Process ◽  
Apraxia Of Speech ◽  
Contextual Variables ◽  
Error Type ◽  
Type Distribution ◽  
Phonetic Features ◽  
Syllable Position

Purpose This retrospective analysis examined group differences in error rate across 4 contextual variables (clusters vs. singletons, syllable position, number of syllables, and articulatory phonetic features) in adults with apraxia of speech (AOS) and adults with aphasia only. Group differences in the distribution of error type across contextual variables were also examined. Method Ten individuals with acquired AOS and aphasia and 11 individuals with aphasia participated in this study. In the context of a 2-group experimental design, the influence of 4 contextual variables on error rate and error type distribution was examined via repetition of 29 multisyllabic words. Error rates were analyzed using Bayesian methods, whereas distribution of error type was examined via descriptive statistics. Results There were 4 findings of robust differences between the 2 groups. These differences were found for syllable position, number of syllables, manner of articulation, and voicing. Group differences were less robust for clusters versus singletons and place of articulation. Results of error type distribution show a high proportion of distortion and substitution errors in speakers with AOS and a high proportion of substitution and omission errors in speakers with aphasia. Conclusion Findings add to the continued effort to improve the understanding and assessment of AOS and aphasia. Several contextual variables more consistently influenced breakdown in participants with AOS compared to participants with aphasia and should be considered during the diagnostic process. Supplemental Material https://doi.org/10.23641/asha.9701690

Sign in / Sign up

Export Citation Format

Share Document